Home / 129,080.16-178,099.20-75,334.56

Finding the Fourth Proportional to 129,080.16, 178,099.20 and 75,334.56

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Solution

The fourth proportional to 129,080.16, 178,099.20 and 75,334.56 is: 103,943.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,080.16 : 178,099.20 = 75,334.56 : x
  2. Step 2: Convert to fraction form
    129,080.16/178,099.20 = 75,334.56/x
  3. Step 3: Cross multiply
    129,080.16x = 178,099.20 × 75,334.56
  4. Step 4: Simplify right side
    129,080.16x = 13,417,024,868.35
  5. Step 5: Solve for x
    x = 13,417,024,868.35/129,080.16
  6. Step 6: Final answer
    x = 103,943.35

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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.