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Finding the Fourth Proportional to 61,365.60, 91,951.20 and 39,139.20

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Solution

The fourth proportional to 61,365.60, 91,951.20 and 39,139.20 is: 58,646.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,365.60 : 91,951.20 = 39,139.20 : x
  2. Step 2: Convert to fraction form
    61,365.60/91,951.20 = 39,139.20/x
  3. Step 3: Cross multiply
    61,365.60x = 91,951.20 × 39,139.20
  4. Step 4: Simplify right side
    61,365.60x = 3,598,896,407.04
  5. Step 5: Solve for x
    x = 3,598,896,407.04/61,365.60
  6. Step 6: Final answer
    x = 58,646.81

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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.