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Finding the Fourth Proportional to 61,356.60, 91,937.70 and 39,130.20

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Solution

The fourth proportional to 61,356.60, 91,937.70 and 39,130.20 is: 58,633.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,356.60 : 91,937.70 = 39,130.20 : x
  2. Step 2: Convert to fraction form
    61,356.60/91,937.70 = 39,130.20/x
  3. Step 3: Cross multiply
    61,356.60x = 91,937.70 × 39,130.20
  4. Step 4: Simplify right side
    61,356.60x = 3,597,540,588.54
  5. Step 5: Solve for x
    x = 3,597,540,588.54/61,356.60
  6. Step 6: Final answer
    x = 58,633.31

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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.