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Finding the Fourth Proportional to 78,887.56, 108,869.26 and 43,080.90

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Solution

The fourth proportional to 78,887.56, 108,869.26 and 43,080.90 is: 59,454.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,887.56 : 108,869.26 = 43,080.90 : x
  2. Step 2: Convert to fraction form
    78,887.56/108,869.26 = 43,080.90/x
  3. Step 3: Cross multiply
    78,887.56x = 108,869.26 × 43,080.90
  4. Step 4: Simplify right side
    78,887.56x = 4,690,185,703.13
  5. Step 5: Solve for x
    x = 4,690,185,703.13/78,887.56
  6. Step 6: Final answer
    x = 59,454.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.