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Finding the Fourth Proportional to 158,517.71, 218,752.85 and 86,898.93

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Solution

The fourth proportional to 158,517.71, 218,752.85 and 86,898.93 is: 119,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,517.71 : 218,752.85 = 86,898.93 : x
  2. Step 2: Convert to fraction form
    158,517.71/218,752.85 = 86,898.93/x
  3. Step 3: Cross multiply
    158,517.71x = 218,752.85 × 86,898.93
  4. Step 4: Simplify right side
    158,517.71x = 19,009,387,996.37
  5. Step 5: Solve for x
    x = 19,009,387,996.37/158,517.71
  6. Step 6: Final answer
    x = 119,919.65

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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.