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Finding the Fourth Proportional to 155,963.86, 215,229.48 and 84,343.92

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Solution

The fourth proportional to 155,963.86, 215,229.48 and 84,343.92 is: 116,394.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,963.86 : 215,229.48 = 84,343.92 : x
  2. Step 2: Convert to fraction form
    155,963.86/215,229.48 = 84,343.92/x
  3. Step 3: Cross multiply
    155,963.86x = 215,229.48 × 84,343.92
  4. Step 4: Simplify right side
    155,963.86x = 18,153,298,042.76
  5. Step 5: Solve for x
    x = 18,153,298,042.76/155,963.86
  6. Step 6: Final answer
    x = 116,394.26

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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.