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Finding the Fourth Proportional to 129,753.80, 179,061.54 and 76,070.60

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Solution

The fourth proportional to 129,753.80, 179,061.54 and 76,070.60 is: 104,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,753.80 : 179,061.54 = 76,070.60 : x
  2. Step 2: Convert to fraction form
    129,753.80/179,061.54 = 76,070.60/x
  3. Step 3: Cross multiply
    129,753.80x = 179,061.54 × 76,070.60
  4. Step 4: Simplify right side
    129,753.80x = 13,621,318,784.72
  5. Step 5: Solve for x
    x = 13,621,318,784.72/129,753.80
  6. Step 6: Final answer
    x = 104,978.19

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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.