Home / 129,086.92-178,131.18-72,497.08

Finding the Fourth Proportional to 129,086.92, 178,131.18 and 72,497.08

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Solution

The fourth proportional to 129,086.92, 178,131.18 and 72,497.08 is: 100,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,086.92 : 178,131.18 = 72,497.08 : x
  2. Step 2: Convert to fraction form
    129,086.92/178,131.18 = 72,497.08/x
  3. Step 3: Cross multiply
    129,086.92x = 178,131.18 × 72,497.08
  4. Step 4: Simplify right side
    129,086.92x = 12,913,990,406.95
  5. Step 5: Solve for x
    x = 12,913,990,406.95/129,086.92
  6. Step 6: Final answer
    x = 100,041.05

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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.