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Finding the Fourth Proportional to 425,111.76, 637,517.34 and 125,512.20

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Solution

The fourth proportional to 425,111.76, 637,517.34 and 125,512.20 is: 188,223.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,111.76 : 637,517.34 = 125,512.20 : x
  2. Step 2: Convert to fraction form
    425,111.76/637,517.34 = 125,512.20/x
  3. Step 3: Cross multiply
    425,111.76x = 637,517.34 × 125,512.20
  4. Step 4: Simplify right side
    425,111.76x = 80,016,203,881.55
  5. Step 5: Solve for x
    x = 80,016,203,881.55/425,111.76
  6. Step 6: Final answer
    x = 188,223.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.