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Finding the Fourth Proportional to 139,479.90, 209,141.08 and 127,577.84

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Solution

The fourth proportional to 139,479.90, 209,141.08 and 127,577.84 is: 191,294.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,479.90 : 209,141.08 = 127,577.84 : x
  2. Step 2: Convert to fraction form
    139,479.90/209,141.08 = 127,577.84/x
  3. Step 3: Cross multiply
    139,479.90x = 209,141.08 × 127,577.84
  4. Step 4: Simplify right side
    139,479.90x = 26,681,765,877.02
  5. Step 5: Solve for x
    x = 26,681,765,877.02/139,479.90
  6. Step 6: Final answer
    x = 191,294.71

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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.