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Finding the Fourth Proportional to 158,591.52, 218,856.60 and 86,972.07

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Solution

The fourth proportional to 158,591.52, 218,856.60 and 86,972.07 is: 120,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,591.52 : 218,856.60 = 86,972.07 : x
  2. Step 2: Convert to fraction form
    158,591.52/218,856.60 = 86,972.07/x
  3. Step 3: Cross multiply
    158,591.52x = 218,856.60 × 86,972.07
  4. Step 4: Simplify right side
    158,591.52x = 19,034,411,535.16
  5. Step 5: Solve for x
    x = 19,034,411,535.16/158,591.52
  6. Step 6: Final answer
    x = 120,021.62

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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.