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Finding the Fourth Proportional to 155,989.78, 215,260.93 and 88,005.85

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Solution

The fourth proportional to 155,989.78, 215,260.93 and 88,005.85 is: 121,445.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,989.78 : 215,260.93 = 88,005.85 : x
  2. Step 2: Convert to fraction form
    155,989.78/215,260.93 = 88,005.85/x
  3. Step 3: Cross multiply
    155,989.78x = 215,260.93 × 88,005.85
  4. Step 4: Simplify right side
    155,989.78x = 18,944,221,116.44
  5. Step 5: Solve for x
    x = 18,944,221,116.44/155,989.78
  6. Step 6: Final answer
    x = 121,445.27

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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.