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Finding the Fourth Proportional to 78,805.17, 118,229.76 and 43,769.43

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Solution

The fourth proportional to 78,805.17, 118,229.76 and 43,769.43 is: 65,666.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,805.17 : 118,229.76 = 43,769.43 : x
  2. Step 2: Convert to fraction form
    78,805.17/118,229.76 = 43,769.43/x
  3. Step 3: Cross multiply
    78,805.17x = 118,229.76 × 43,769.43
  4. Step 4: Simplify right side
    78,805.17x = 5,174,849,204.24
  5. Step 5: Solve for x
    x = 5,174,849,204.24/78,805.17
  6. Step 6: Final answer
    x = 65,666.37

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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.