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Finding the Fourth Proportional to 66,432.88, 91,681.02 and 38,140.39

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Solution

The fourth proportional to 66,432.88, 91,681.02 and 38,140.39 is: 52,635.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,432.88 : 91,681.02 = 38,140.39 : x
  2. Step 2: Convert to fraction form
    66,432.88/91,681.02 = 38,140.39/x
  3. Step 3: Cross multiply
    66,432.88x = 91,681.02 × 38,140.39
  4. Step 4: Simplify right side
    66,432.88x = 3,496,749,209.29
  5. Step 5: Solve for x
    x = 3,496,749,209.29/66,432.88
  6. Step 6: Final answer
    x = 52,635.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.