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Finding the Fourth Proportional to 158,458.17, 218,677.88 and 86,838.20

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Solution

The fourth proportional to 158,458.17, 218,677.88 and 86,838.20 is: 119,839.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,458.17 : 218,677.88 = 86,838.20 : x
  2. Step 2: Convert to fraction form
    158,458.17/218,677.88 = 86,838.20/x
  3. Step 3: Cross multiply
    158,458.17x = 218,677.88 × 86,838.20
  4. Step 4: Simplify right side
    158,458.17x = 18,989,593,917.16
  5. Step 5: Solve for x
    x = 18,989,593,917.16/158,458.17
  6. Step 6: Final answer
    x = 119,839.79

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1.5x scale

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.