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Finding the Fourth Proportional to 140,363.78, 210,616.05 and 65,489.90

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Solution

The fourth proportional to 140,363.78, 210,616.05 and 65,489.90 is: 98,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,363.78 : 210,616.05 = 65,489.90 : x
  2. Step 2: Convert to fraction form
    140,363.78/210,616.05 = 65,489.90/x
  3. Step 3: Cross multiply
    140,363.78x = 210,616.05 × 65,489.90
  4. Step 4: Simplify right side
    140,363.78x = 13,793,224,052.90
  5. Step 5: Solve for x
    x = 13,793,224,052.90/140,363.78
  6. Step 6: Final answer
    x = 98,267.69

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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.