Home / 129,870.55-179,251.20-76,172.87

Finding the Fourth Proportional to 129,870.55, 179,251.20 and 76,172.87

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Solution

The fourth proportional to 129,870.55, 179,251.20 and 76,172.87 is: 105,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,870.55 : 179,251.20 = 76,172.87 : x
  2. Step 2: Convert to fraction form
    129,870.55/179,251.20 = 76,172.87/x
  3. Step 3: Cross multiply
    129,870.55x = 179,251.20 × 76,172.87
  4. Step 4: Simplify right side
    129,870.55x = 13,654,077,077.82
  5. Step 5: Solve for x
    x = 13,654,077,077.82/129,870.55
  6. Step 6: Final answer
    x = 105,136.05

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1.5x scale

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.