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Finding the Fourth Proportional to 158,374.62, 218,551.14 and 86,755.32

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Solution

The fourth proportional to 158,374.62, 218,551.14 and 86,755.32 is: 119,719.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,374.62 : 218,551.14 = 86,755.32 : x
  2. Step 2: Convert to fraction form
    158,374.62/218,551.14 = 86,755.32/x
  3. Step 3: Cross multiply
    158,374.62x = 218,551.14 × 86,755.32
  4. Step 4: Simplify right side
    158,374.62x = 18,960,474,087.06
  5. Step 5: Solve for x
    x = 18,960,474,087.06/158,374.62
  6. Step 6: Final answer
    x = 119,719.14

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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.