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Finding the Fourth Proportional to 158,487.64, 218,711.10 and 85,889.08

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Solution

The fourth proportional to 158,487.64, 218,711.10 and 85,889.08 is: 118,525.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,487.64 : 218,711.10 = 85,889.08 : x
  2. Step 2: Convert to fraction form
    158,487.64/218,711.10 = 85,889.08/x
  3. Step 3: Cross multiply
    158,487.64x = 218,711.10 × 85,889.08
  4. Step 4: Simplify right side
    158,487.64x = 18,784,895,164.79
  5. Step 5: Solve for x
    x = 18,784,895,164.79/158,487.64
  6. Step 6: Final answer
    x = 118,525.93

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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.