Home / 91,831.20-137,746.80-76,279.20

Finding the Fourth Proportional to 91,831.20, 137,746.80 and 76,279.20

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Solution

The fourth proportional to 91,831.20, 137,746.80 and 76,279.20 is: 114,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,831.20 : 137,746.80 = 76,279.20 : x
  2. Step 2: Convert to fraction form
    91,831.20/137,746.80 = 76,279.20/x
  3. Step 3: Cross multiply
    91,831.20x = 137,746.80 × 76,279.20
  4. Step 4: Simplify right side
    91,831.20x = 10,507,215,706.56
  5. Step 5: Solve for x
    x = 10,507,215,706.56/91,831.20
  6. Step 6: Final answer
    x = 114,418.80

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1.5x scale

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.