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Finding the Fourth Proportional to 129,776, 179,116.80 and 73,188.32

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Solution

The fourth proportional to 129,776, 179,116.80 and 73,188.32 is: 101,014.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,776 : 179,116.80 = 73,188.32 : x
  2. Step 2: Convert to fraction form
    129,776/179,116.80 = 73,188.32/x
  3. Step 3: Cross multiply
    129,776x = 179,116.80 × 73,188.32
  4. Step 4: Simplify right side
    129,776x = 13,109,257,675.78
  5. Step 5: Solve for x
    x = 13,109,257,675.78/129,776
  6. Step 6: Final answer
    x = 101,014.50

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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.