Home / 83,640.26-115,423.98-47,831.78

Finding the Fourth Proportional to 83,640.26, 115,423.98 and 47,831.78

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Solution

The fourth proportional to 83,640.26, 115,423.98 and 47,831.78 is: 66,008.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,640.26 : 115,423.98 = 47,831.78 : x
  2. Step 2: Convert to fraction form
    83,640.26/115,423.98 = 47,831.78/x
  3. Step 3: Cross multiply
    83,640.26x = 115,423.98 × 47,831.78
  4. Step 4: Simplify right side
    83,640.26x = 5,520,934,418.08
  5. Step 5: Solve for x
    x = 5,520,934,418.08/83,640.26
  6. Step 6: Final answer
    x = 66,008.10

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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.