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Finding the Fourth Proportional to 126,990, 175,247.42 and 70,402.59

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Solution

The fourth proportional to 126,990, 175,247.42 and 70,402.59 is: 97,156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,990 : 175,247.42 = 70,402.59 : x
  2. Step 2: Convert to fraction form
    126,990/175,247.42 = 70,402.59/x
  3. Step 3: Cross multiply
    126,990x = 175,247.42 × 70,402.59
  4. Step 4: Simplify right side
    126,990x = 12,337,871,906.80
  5. Step 5: Solve for x
    x = 12,337,871,906.80/126,990
  6. Step 6: Final answer
    x = 97,156.25

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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.