Home / 129,591.43-178,814.49-72,218.19

Finding the Fourth Proportional to 129,591.43, 178,814.49 and 72,218.19

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Solution

The fourth proportional to 129,591.43, 178,814.49 and 72,218.19 is: 99,649.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,591.43 : 178,814.49 = 72,218.19 : x
  2. Step 2: Convert to fraction form
    129,591.43/178,814.49 = 72,218.19/x
  3. Step 3: Cross multiply
    129,591.43x = 178,814.49 × 72,218.19
  4. Step 4: Simplify right side
    129,591.43x = 12,913,658,813.57
  5. Step 5: Solve for x
    x = 12,913,658,813.57/129,591.43
  6. Step 6: Final answer
    x = 99,649.02

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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.