Home / 129,506.37-178,695.09-72,144.30

Finding the Fourth Proportional to 129,506.37, 178,695.09 and 72,144.30

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Solution

The fourth proportional to 129,506.37, 178,695.09 and 72,144.30 is: 99,545.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,506.37 : 178,695.09 = 72,144.30 : x
  2. Step 2: Convert to fraction form
    129,506.37/178,695.09 = 72,144.30/x
  3. Step 3: Cross multiply
    129,506.37x = 178,695.09 × 72,144.30
  4. Step 4: Simplify right side
    129,506.37x = 12,891,832,181.49
  5. Step 5: Solve for x
    x = 12,891,832,181.49/129,506.37
  6. Step 6: Final answer
    x = 99,545.93

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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.