Home / 129,428.48-178,576.42-75,726.69

Finding the Fourth Proportional to 129,428.48, 178,576.42 and 75,726.69

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Solution

The fourth proportional to 129,428.48, 178,576.42 and 75,726.69 is: 104,482.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428.48 : 178,576.42 = 75,726.69 : x
  2. Step 2: Convert to fraction form
    129,428.48/178,576.42 = 75,726.69/x
  3. Step 3: Cross multiply
    129,428.48x = 178,576.42 × 75,726.69
  4. Step 4: Simplify right side
    129,428.48x = 13,523,001,198.65
  5. Step 5: Solve for x
    x = 13,523,001,198.65/129,428.48
  6. Step 6: Final answer
    x = 104,482.42

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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.