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Finding the Fourth Proportional to 521,191.68, 781,900.16 and 161,361.92

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Solution

The fourth proportional to 521,191.68, 781,900.16 and 161,361.92 is: 242,077.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,191.68 : 781,900.16 = 161,361.92 : x
  2. Step 2: Convert to fraction form
    521,191.68/781,900.16 = 161,361.92/x
  3. Step 3: Cross multiply
    521,191.68x = 781,900.16 × 161,361.92
  4. Step 4: Simplify right side
    521,191.68x = 126,168,911,065.91
  5. Step 5: Solve for x
    x = 126,168,911,065.91/521,191.68
  6. Step 6: Final answer
    x = 242,077.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.