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Finding the Fourth Proportional to 78,775.92, 118,165.50 and 43,937.28

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Solution

The fourth proportional to 78,775.92, 118,165.50 and 43,937.28 is: 65,906.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,775.92 : 118,165.50 = 43,937.28 : x
  2. Step 2: Convert to fraction form
    78,775.92/118,165.50 = 43,937.28/x
  3. Step 3: Cross multiply
    78,775.92x = 118,165.50 × 43,937.28
  4. Step 4: Simplify right side
    78,775.92x = 5,191,870,659.84
  5. Step 5: Solve for x
    x = 5,191,870,659.84/78,775.92
  6. Step 6: Final answer
    x = 65,906.82

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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.