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Finding the Fourth Proportional to 129,902, 179,264.88 and 73,312.16

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Solution

The fourth proportional to 129,902, 179,264.88 and 73,312.16 is: 101,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,902 : 179,264.88 = 73,312.16 : x
  2. Step 2: Convert to fraction form
    129,902/179,264.88 = 73,312.16/x
  3. Step 3: Cross multiply
    129,902x = 179,264.88 × 73,312.16
  4. Step 4: Simplify right side
    129,902x = 13,142,295,564.94
  5. Step 5: Solve for x
    x = 13,142,295,564.94/129,902
  6. Step 6: Final answer
    x = 101,170.85

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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.