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Finding the Fourth Proportional to 478,742.47, 718,138.31 and 123,759.56

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Solution

The fourth proportional to 478,742.47, 718,138.31 and 123,759.56 is: 185,645.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,742.47 : 718,138.31 = 123,759.56 : x
  2. Step 2: Convert to fraction form
    478,742.47/718,138.31 = 123,759.56/x
  3. Step 3: Cross multiply
    478,742.47x = 718,138.31 × 123,759.56
  4. Step 4: Simplify right side
    478,742.47x = 88,876,482,441.29
  5. Step 5: Solve for x
    x = 88,876,482,441.29/478,742.47
  6. Step 6: Final answer
    x = 185,645.70

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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.