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Finding the Fourth Proportional to 158,325.32, 218,489.64 and 86,705.84

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Solution

The fourth proportional to 158,325.32, 218,489.64 and 86,705.84 is: 119,654.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,325.32 : 218,489.64 = 86,705.84 : x
  2. Step 2: Convert to fraction form
    158,325.32/218,489.64 = 86,705.84/x
  3. Step 3: Cross multiply
    158,325.32x = 218,489.64 × 86,705.84
  4. Step 4: Simplify right side
    158,325.32x = 18,944,327,767.50
  5. Step 5: Solve for x
    x = 18,944,327,767.50/158,325.32
  6. Step 6: Final answer
    x = 119,654.44

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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.