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Finding the Fourth Proportional to 56,957.31, 85,352.90 and 40,308.30

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Solution

The fourth proportional to 56,957.31, 85,352.90 and 40,308.30 is: 60,403.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,957.31 : 85,352.90 = 40,308.30 : x
  2. Step 2: Convert to fraction form
    56,957.31/85,352.90 = 40,308.30/x
  3. Step 3: Cross multiply
    56,957.31x = 85,352.90 × 40,308.30
  4. Step 4: Simplify right side
    56,957.31x = 3,440,430,097.53
  5. Step 5: Solve for x
    x = 3,440,430,097.53/56,957.31
  6. Step 6: Final answer
    x = 60,403.66

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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.