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Finding the Fourth Proportional to 126,620.58, 174,738.15 and 72,915.15

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Solution

The fourth proportional to 126,620.58, 174,738.15 and 72,915.15 is: 100,623.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,620.58 : 174,738.15 = 72,915.15 : x
  2. Step 2: Convert to fraction form
    126,620.58/174,738.15 = 72,915.15/x
  3. Step 3: Cross multiply
    126,620.58x = 174,738.15 × 72,915.15
  4. Step 4: Simplify right side
    126,620.58x = 12,741,058,417.97
  5. Step 5: Solve for x
    x = 12,741,058,417.97/126,620.58
  6. Step 6: Final answer
    x = 100,623.91

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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.