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Finding the Fourth Proportional to 143,730, 215,687.28 and 96,398.55

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Solution

The fourth proportional to 143,730, 215,687.28 and 96,398.55 is: 144,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,730 : 215,687.28 = 96,398.55 : x
  2. Step 2: Convert to fraction form
    143,730/215,687.28 = 96,398.55/x
  3. Step 3: Cross multiply
    143,730x = 215,687.28 × 96,398.55
  4. Step 4: Simplify right side
    143,730x = 20,791,941,045.44
  5. Step 5: Solve for x
    x = 20,791,941,045.44/143,730
  6. Step 6: Final answer
    x = 144,659.72

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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.