Home / 129,180.04-178,260.10-75,480.20

Finding the Fourth Proportional to 129,180.04, 178,260.10 and 75,480.20

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Solution

The fourth proportional to 129,180.04, 178,260.10 and 75,480.20 is: 104,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,180.04 : 178,260.10 = 75,480.20 : x
  2. Step 2: Convert to fraction form
    129,180.04/178,260.10 = 75,480.20/x
  3. Step 3: Cross multiply
    129,180.04x = 178,260.10 × 75,480.20
  4. Step 4: Simplify right side
    129,180.04x = 13,455,108,000.02
  5. Step 5: Solve for x
    x = 13,455,108,000.02/129,180.04
  6. Step 6: Final answer
    x = 104,157.79

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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.