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Finding the Fourth Proportional to 139,454,909.70, 209,182,364.55 and 130,951,853.70

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Solution

The fourth proportional to 139,454,909.70, 209,182,364.55 and 130,951,853.70 is: 196,427,780.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,454,909.70 : 209,182,364.55 = 130,951,853.70 : x
  2. Step 2: Convert to fraction form
    139,454,909.70/209,182,364.55 = 130,951,853.70/x
  3. Step 3: Cross multiply
    139,454,909.70x = 209,182,364.55 × 130,951,853.70
  4. Step 4: Simplify right side
    139,454,909.70x = 27,392,818,399,171,668
  5. Step 5: Solve for x
    x = 27,392,818,399,171,668/139,454,909.70
  6. Step 6: Final answer
    x = 196,427,780.55

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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.