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Finding the Fourth Proportional to 139,641.84, 209,431.17 and 39,799.86

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Solution

The fourth proportional to 139,641.84, 209,431.17 and 39,799.86 is: 59,690.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,641.84 : 209,431.17 = 39,799.86 : x
  2. Step 2: Convert to fraction form
    139,641.84/209,431.17 = 39,799.86/x
  3. Step 3: Cross multiply
    139,641.84x = 209,431.17 × 39,799.86
  4. Step 4: Simplify right side
    139,641.84x = 8,335,331,245.64
  5. Step 5: Solve for x
    x = 8,335,331,245.64/139,641.84
  6. Step 6: Final answer
    x = 59,690.79

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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.