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Finding the Fourth Proportional to 129,750.71, 179,060.40 and 75,298.69

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Solution

The fourth proportional to 129,750.71, 179,060.40 and 75,298.69 is: 103,914.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,750.71 : 179,060.40 = 75,298.69 : x
  2. Step 2: Convert to fraction form
    129,750.71/179,060.40 = 75,298.69/x
  3. Step 3: Cross multiply
    129,750.71x = 179,060.40 × 75,298.69
  4. Step 4: Simplify right side
    129,750.71x = 13,483,013,774.70
  5. Step 5: Solve for x
    x = 13,483,013,774.70/129,750.71
  6. Step 6: Final answer
    x = 103,914.76

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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.