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Finding the Fourth Proportional to 478,755.11, 718,157.26 and 123,772.20

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Solution

The fourth proportional to 478,755.11, 718,157.26 and 123,772.20 is: 185,664.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,755.11 : 718,157.26 = 123,772.20 : x
  2. Step 2: Convert to fraction form
    478,755.11/718,157.26 = 123,772.20/x
  3. Step 3: Cross multiply
    478,755.11x = 718,157.26 × 123,772.20
  4. Step 4: Simplify right side
    478,755.11x = 88,887,905,865.54
  5. Step 5: Solve for x
    x = 88,887,905,865.54/478,755.11
  6. Step 6: Final answer
    x = 185,664.66

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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.