Home / 129,905.35-179,265.88-72,543.08

Finding the Fourth Proportional to 129,905.35, 179,265.88 and 72,543.08

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Solution

The fourth proportional to 129,905.35, 179,265.88 and 72,543.08 is: 100,107.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,905.35 : 179,265.88 = 72,543.08 : x
  2. Step 2: Convert to fraction form
    129,905.35/179,265.88 = 72,543.08/x
  3. Step 3: Cross multiply
    129,905.35x = 179,265.88 × 72,543.08
  4. Step 4: Simplify right side
    129,905.35x = 13,004,498,808.61
  5. Step 5: Solve for x
    x = 13,004,498,808.61/129,905.35
  6. Step 6: Final answer
    x = 100,107.49

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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.