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Finding the Fourth Proportional to 140,553.80, 210,927.90 and 101,139.20

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Solution

The fourth proportional to 140,553.80, 210,927.90 and 101,139.20 is: 151,778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,553.80 : 210,927.90 = 101,139.20 : x
  2. Step 2: Convert to fraction form
    140,553.80/210,927.90 = 101,139.20/x
  3. Step 3: Cross multiply
    140,553.80x = 210,927.90 × 101,139.20
  4. Step 4: Simplify right side
    140,553.80x = 21,333,079,063.68
  5. Step 5: Solve for x
    x = 21,333,079,063.68/140,553.80
  6. Step 6: Final answer
    x = 151,778.74

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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.