Home / 129,591.07-178,813.98-72,217.80

Finding the Fourth Proportional to 129,591.07, 178,813.98 and 72,217.80

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Solution

The fourth proportional to 129,591.07, 178,813.98 and 72,217.80 is: 99,648.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,591.07 : 178,813.98 = 72,217.80 : x
  2. Step 2: Convert to fraction form
    129,591.07/178,813.98 = 72,217.80/x
  3. Step 3: Cross multiply
    129,591.07x = 178,813.98 × 72,217.80
  4. Step 4: Simplify right side
    129,591.07x = 12,913,552,425.39
  5. Step 5: Solve for x
    x = 12,913,552,425.39/129,591.07
  6. Step 6: Final answer
    x = 99,648.48

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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.