Home / 129,476.24-178,674.45-72,115.38

Finding the Fourth Proportional to 129,476.24, 178,674.45 and 72,115.38

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Solution

The fourth proportional to 129,476.24, 178,674.45 and 72,115.38 is: 99,517.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,476.24 : 178,674.45 = 72,115.38 : x
  2. Step 2: Convert to fraction form
    129,476.24/178,674.45 = 72,115.38/x
  3. Step 3: Cross multiply
    129,476.24x = 178,674.45 × 72,115.38
  4. Step 4: Simplify right side
    129,476.24x = 12,885,175,858.04
  5. Step 5: Solve for x
    x = 12,885,175,858.04/129,476.24
  6. Step 6: Final answer
    x = 99,517.69

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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.