Home / 129,870.80-179,251.54-76,173.11

Finding the Fourth Proportional to 129,870.80, 179,251.54 and 76,173.11

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Solution

The fourth proportional to 129,870.80, 179,251.54 and 76,173.11 is: 105,136.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,870.80 : 179,251.54 = 76,173.11 : x
  2. Step 2: Convert to fraction form
    129,870.80/179,251.54 = 76,173.11/x
  3. Step 3: Cross multiply
    129,870.80x = 179,251.54 × 76,173.11
  4. Step 4: Simplify right side
    129,870.80x = 13,654,147,274.09
  5. Step 5: Solve for x
    x = 13,654,147,274.09/129,870.80
  6. Step 6: Final answer
    x = 105,136.39

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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.