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Finding the Fourth Proportional to 78,960.88, 108,966.30 and 43,151.44

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Solution

The fourth proportional to 78,960.88, 108,966.30 and 43,151.44 is: 59,549.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,960.88 : 108,966.30 = 43,151.44 : x
  2. Step 2: Convert to fraction form
    78,960.88/108,966.30 = 43,151.44/x
  3. Step 3: Cross multiply
    78,960.88x = 108,966.30 × 43,151.44
  4. Step 4: Simplify right side
    78,960.88x = 4,702,052,756.47
  5. Step 5: Solve for x
    x = 4,702,052,756.47/78,960.88
  6. Step 6: Final answer
    x = 59,549.14

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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.