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Finding the Fourth Proportional to 126,195.49, 174,149.90 and 72,490.90

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Solution

The fourth proportional to 126,195.49, 174,149.90 and 72,490.90 is: 100,037.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,195.49 : 174,149.90 = 72,490.90 : x
  2. Step 2: Convert to fraction form
    126,195.49/174,149.90 = 72,490.90/x
  3. Step 3: Cross multiply
    126,195.49x = 174,149.90 × 72,490.90
  4. Step 4: Simplify right side
    126,195.49x = 12,624,282,985.91
  5. Step 5: Solve for x
    x = 12,624,282,985.91/126,195.49
  6. Step 6: Final answer
    x = 100,037.51

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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.