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Finding the Fourth Proportional to 155,980.53, 215,253.17 and 88,011.91

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Solution

The fourth proportional to 155,980.53, 215,253.17 and 88,011.91 is: 121,456.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,980.53 : 215,253.17 = 88,011.91 : x
  2. Step 2: Convert to fraction form
    155,980.53/215,253.17 = 88,011.91/x
  3. Step 3: Cross multiply
    155,980.53x = 215,253.17 × 88,011.91
  4. Step 4: Simplify right side
    155,980.53x = 18,944,842,307.15
  5. Step 5: Solve for x
    x = 18,944,842,307.15/155,980.53
  6. Step 6: Final answer
    x = 121,456.46

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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.