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Finding the Fourth Proportional to 66,207.40, 99,051.90 and 42,879.40

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Solution

The fourth proportional to 66,207.40, 99,051.90 and 42,879.40 is: 64,151.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.40 : 99,051.90 = 42,879.40 : x
  2. Step 2: Convert to fraction form
    66,207.40/99,051.90 = 42,879.40/x
  3. Step 3: Cross multiply
    66,207.40x = 99,051.90 × 42,879.40
  4. Step 4: Simplify right side
    66,207.40x = 4,247,286,040.86
  5. Step 5: Solve for x
    x = 4,247,286,040.86/66,207.40
  6. Step 6: Final answer
    x = 64,151.23

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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.