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Finding the Fourth Proportional to 157,042.90, 216,724.90 and 89,987.86

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Solution

The fourth proportional to 157,042.90, 216,724.90 and 89,987.86 is: 124,186.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,042.90 : 216,724.90 = 89,987.86 : x
  2. Step 2: Convert to fraction form
    157,042.90/216,724.90 = 89,987.86/x
  3. Step 3: Cross multiply
    157,042.90x = 216,724.90 × 89,987.86
  4. Step 4: Simplify right side
    157,042.90x = 19,502,608,876.09
  5. Step 5: Solve for x
    x = 19,502,608,876.09/157,042.90
  6. Step 6: Final answer
    x = 124,186.51

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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.