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Finding the Fourth Proportional to 140,007.85, 209,973.07 and 38,781.70

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Solution

The fourth proportional to 140,007.85, 209,973.07 and 38,781.70 is: 58,161.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,007.85 : 209,973.07 = 38,781.70 : x
  2. Step 2: Convert to fraction form
    140,007.85/209,973.07 = 38,781.70/x
  3. Step 3: Cross multiply
    140,007.85x = 209,973.07 × 38,781.70
  4. Step 4: Simplify right side
    140,007.85x = 8,143,112,608.82
  5. Step 5: Solve for x
    x = 8,143,112,608.82/140,007.85
  6. Step 6: Final answer
    x = 58,161.83

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1.5x scale

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.