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Finding the Fourth Proportional to 61,807.12, 85,262.43 and 39,107.86

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Solution

The fourth proportional to 61,807.12, 85,262.43 and 39,107.86 is: 53,948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,807.12 : 85,262.43 = 39,107.86 : x
  2. Step 2: Convert to fraction form
    61,807.12/85,262.43 = 39,107.86/x
  3. Step 3: Cross multiply
    61,807.12x = 85,262.43 × 39,107.86
  4. Step 4: Simplify right side
    61,807.12x = 3,334,431,175.70
  5. Step 5: Solve for x
    x = 3,334,431,175.70/61,807.12
  6. Step 6: Final answer
    x = 53,948.98

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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.