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Finding the Fourth Proportional to 140,658.73, 210,932.50 and 45,865.61

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Solution

The fourth proportional to 140,658.73, 210,932.50 and 45,865.61 is: 68,780.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,658.73 : 210,932.50 = 45,865.61 : x
  2. Step 2: Convert to fraction form
    140,658.73/210,932.50 = 45,865.61/x
  3. Step 3: Cross multiply
    140,658.73x = 210,932.50 × 45,865.61
  4. Step 4: Simplify right side
    140,658.73x = 9,674,547,781.33
  5. Step 5: Solve for x
    x = 9,674,547,781.33/140,658.73
  6. Step 6: Final answer
    x = 68,780.29

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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.