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Finding the Fourth Proportional to 101,446.64, 140,043.28 and 72,397.36

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Solution

The fourth proportional to 101,446.64, 140,043.28 and 72,397.36 is: 99,941.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,446.64 : 140,043.28 = 72,397.36 : x
  2. Step 2: Convert to fraction form
    101,446.64/140,043.28 = 72,397.36/x
  3. Step 3: Cross multiply
    101,446.64x = 140,043.28 × 72,397.36
  4. Step 4: Simplify right side
    101,446.64x = 10,138,763,757.74
  5. Step 5: Solve for x
    x = 10,138,763,757.74/101,446.64
  6. Step 6: Final answer
    x = 99,941.84

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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.