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Finding the Fourth Proportional to 124,963.92, 172,445.76 and 74,653.20

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Solution

The fourth proportional to 124,963.92, 172,445.76 and 74,653.20 is: 103,018.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,963.92 : 172,445.76 = 74,653.20 : x
  2. Step 2: Convert to fraction form
    124,963.92/172,445.76 = 74,653.20/x
  3. Step 3: Cross multiply
    124,963.92x = 172,445.76 × 74,653.20
  4. Step 4: Simplify right side
    124,963.92x = 12,873,627,810.43
  5. Step 5: Solve for x
    x = 12,873,627,810.43/124,963.92
  6. Step 6: Final answer
    x = 103,018.76

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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.