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Finding the Fourth Proportional to 66,437.96, 91,691.53 and 40,938.89

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Solution

The fourth proportional to 66,437.96, 91,691.53 and 40,938.89 is: 56,500.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,437.96 : 91,691.53 = 40,938.89 : x
  2. Step 2: Convert to fraction form
    66,437.96/91,691.53 = 40,938.89/x
  3. Step 3: Cross multiply
    66,437.96x = 91,691.53 × 40,938.89
  4. Step 4: Simplify right side
    66,437.96x = 3,753,748,899.80
  5. Step 5: Solve for x
    x = 3,753,748,899.80/66,437.96
  6. Step 6: Final answer
    x = 56,500.07

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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.