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Finding the Fourth Proportional to 66,051,009.80, 99,076,514.70 and 20,606,899.40

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Solution

The fourth proportional to 66,051,009.80, 99,076,514.70 and 20,606,899.40 is: 30,910,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,051,009.80 : 99,076,514.70 = 20,606,899.40 : x
  2. Step 2: Convert to fraction form
    66,051,009.80/99,076,514.70 = 20,606,899.40/x
  3. Step 3: Cross multiply
    66,051,009.80x = 99,076,514.70 × 20,606,899.40
  4. Step 4: Simplify right side
    66,051,009.80x = 2,041,659,771,325,521
  5. Step 5: Solve for x
    x = 2,041,659,771,325,521/66,051,009.80
  6. Step 6: Final answer
    x = 30,910,349.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.