Home / 129,013.80-178,039.22-72,425.58

Finding the Fourth Proportional to 129,013.80, 178,039.22 and 72,425.58

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Solution

The fourth proportional to 129,013.80, 178,039.22 and 72,425.58 is: 99,947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,013.80 : 178,039.22 = 72,425.58 : x
  2. Step 2: Convert to fraction form
    129,013.80/178,039.22 = 72,425.58/x
  3. Step 3: Cross multiply
    129,013.80x = 178,039.22 × 72,425.58
  4. Step 4: Simplify right side
    129,013.80x = 12,894,593,771.25
  5. Step 5: Solve for x
    x = 12,894,593,771.25/129,013.80
  6. Step 6: Final answer
    x = 99,947.40

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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.