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Finding the Fourth Proportional to 61,395.60, 91,996.20 and 39,169.20

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Solution

The fourth proportional to 61,395.60, 91,996.20 and 39,169.20 is: 58,691.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,395.60 : 91,996.20 = 39,169.20 : x
  2. Step 2: Convert to fraction form
    61,395.60/91,996.20 = 39,169.20/x
  3. Step 3: Cross multiply
    61,395.60x = 91,996.20 × 39,169.20
  4. Step 4: Simplify right side
    61,395.60x = 3,603,417,557.04
  5. Step 5: Solve for x
    x = 3,603,417,557.04/61,395.60
  6. Step 6: Final answer
    x = 58,691.79

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1.5x scale

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.