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Finding the Fourth Proportional to 72,872.48, 109,343.28 and 43,348.52

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Solution

The fourth proportional to 72,872.48, 109,343.28 and 43,348.52 is: 65,043.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,872.48 : 109,343.28 = 43,348.52 : x
  2. Step 2: Convert to fraction form
    72,872.48/109,343.28 = 43,348.52/x
  3. Step 3: Cross multiply
    72,872.48x = 109,343.28 × 43,348.52
  4. Step 4: Simplify right side
    72,872.48x = 4,739,869,359.95
  5. Step 5: Solve for x
    x = 4,739,869,359.95/72,872.48
  6. Step 6: Final answer
    x = 65,043.34

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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.