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Finding the Fourth Proportional to 66,068.80, 99,103.20 and 16,820.80

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Solution

The fourth proportional to 66,068.80, 99,103.20 and 16,820.80 is: 25,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,068.80 : 99,103.20 = 16,820.80 : x
  2. Step 2: Convert to fraction form
    66,068.80/99,103.20 = 16,820.80/x
  3. Step 3: Cross multiply
    66,068.80x = 99,103.20 × 16,820.80
  4. Step 4: Simplify right side
    66,068.80x = 1,666,995,106.56
  5. Step 5: Solve for x
    x = 1,666,995,106.56/66,068.80
  6. Step 6: Final answer
    x = 25,231.20

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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.