Home / 129,201.24-178,297.88-71,839.95

Finding the Fourth Proportional to 129,201.24, 178,297.88 and 71,839.95

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Solution

The fourth proportional to 129,201.24, 178,297.88 and 71,839.95 is: 99,139.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,201.24 : 178,297.88 = 71,839.95 : x
  2. Step 2: Convert to fraction form
    129,201.24/178,297.88 = 71,839.95/x
  3. Step 3: Cross multiply
    129,201.24x = 178,297.88 × 71,839.95
  4. Step 4: Simplify right side
    129,201.24x = 12,808,909,756.49
  5. Step 5: Solve for x
    x = 12,808,909,756.49/129,201.24
  6. Step 6: Final answer
    x = 99,139.21

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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.