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Finding the Fourth Proportional to 265,722.70, 398,328.90 and 88,138.30

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Solution

The fourth proportional to 265,722.70, 398,328.90 and 88,138.30 is: 132,122.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,722.70 : 398,328.90 = 88,138.30 : x
  2. Step 2: Convert to fraction form
    265,722.70/398,328.90 = 88,138.30/x
  3. Step 3: Cross multiply
    265,722.70x = 398,328.90 × 88,138.30
  4. Step 4: Simplify right side
    265,722.70x = 35,108,032,086.87
  5. Step 5: Solve for x
    x = 35,108,032,086.87/265,722.70
  6. Step 6: Final answer
    x = 132,122.82

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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.