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Finding the Fourth Proportional to 126,425.78, 174,472.62 and 72,710.77

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Solution

The fourth proportional to 126,425.78, 174,472.62 and 72,710.77 is: 100,343.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,425.78 : 174,472.62 = 72,710.77 : x
  2. Step 2: Convert to fraction form
    126,425.78/174,472.62 = 72,710.77/x
  3. Step 3: Cross multiply
    126,425.78x = 174,472.62 × 72,710.77
  4. Step 4: Simplify right side
    126,425.78x = 12,686,037,671.75
  5. Step 5: Solve for x
    x = 12,686,037,671.75/126,425.78
  6. Step 6: Final answer
    x = 100,343.76

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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.