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Finding the Fourth Proportional to 92,480.40, 138,785.40 and 39,927.60

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Solution

The fourth proportional to 92,480.40, 138,785.40 and 39,927.60 is: 59,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,480.40 : 138,785.40 = 39,927.60 : x
  2. Step 2: Convert to fraction form
    92,480.40/138,785.40 = 39,927.60/x
  3. Step 3: Cross multiply
    92,480.40x = 138,785.40 × 39,927.60
  4. Step 4: Simplify right side
    92,480.40x = 5,541,367,937.04
  5. Step 5: Solve for x
    x = 5,541,367,937.04/92,480.40
  6. Step 6: Final answer
    x = 59,919.38

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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.