Home / 129,061.88-178,118.09-74,616.40

Finding the Fourth Proportional to 129,061.88, 178,118.09 and 74,616.40

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Solution

The fourth proportional to 129,061.88, 178,118.09 and 74,616.40 is: 102,977.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,061.88 : 178,118.09 = 74,616.40 : x
  2. Step 2: Convert to fraction form
    129,061.88/178,118.09 = 74,616.40/x
  3. Step 3: Cross multiply
    129,061.88x = 178,118.09 × 74,616.40
  4. Step 4: Simplify right side
    129,061.88x = 13,290,530,650.68
  5. Step 5: Solve for x
    x = 13,290,530,650.68/129,061.88
  6. Step 6: Final answer
    x = 102,977.97

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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.