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Finding the Fourth Proportional to 129,776, 179,116.96 and 73,188.48

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Solution

The fourth proportional to 129,776, 179,116.96 and 73,188.48 is: 101,014.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,776 : 179,116.96 = 73,188.48 : x
  2. Step 2: Convert to fraction form
    129,776/179,116.96 = 73,188.48/x
  3. Step 3: Cross multiply
    129,776x = 179,116.96 × 73,188.48
  4. Step 4: Simplify right side
    129,776x = 13,109,298,044.62
  5. Step 5: Solve for x
    x = 13,109,298,044.62/129,776
  6. Step 6: Final answer
    x = 101,014.81

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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.