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Finding the Fourth Proportional to 502,144.20, 753,143.40 and 147,121.20

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Solution

The fourth proportional to 502,144.20, 753,143.40 and 147,121.20 is: 220,660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,144.20 : 753,143.40 = 147,121.20 : x
  2. Step 2: Convert to fraction form
    502,144.20/753,143.40 = 147,121.20/x
  3. Step 3: Cross multiply
    502,144.20x = 753,143.40 × 147,121.20
  4. Step 4: Simplify right side
    502,144.20x = 110,803,360,780.08
  5. Step 5: Solve for x
    x = 110,803,360,780.08/502,144.20
  6. Step 6: Final answer
    x = 220,660.44

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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.