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Finding the Fourth Proportional to 218,901.60, 328,434.42 and 76,757.58

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Solution

The fourth proportional to 218,901.60, 328,434.42 and 76,757.58 is: 115,165.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,901.60 : 328,434.42 = 76,757.58 : x
  2. Step 2: Convert to fraction form
    218,901.60/328,434.42 = 76,757.58/x
  3. Step 3: Cross multiply
    218,901.60x = 328,434.42 × 76,757.58
  4. Step 4: Simplify right side
    218,901.60x = 25,209,831,267.90
  5. Step 5: Solve for x
    x = 25,209,831,267.90/218,901.60
  6. Step 6: Final answer
    x = 115,165.13

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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.