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Finding the Fourth Proportional to 72,831.20, 109,279.20 and 26,117.60

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Solution

The fourth proportional to 72,831.20, 109,279.20 and 26,117.60 is: 39,188.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,831.20 : 109,279.20 = 26,117.60 : x
  2. Step 2: Convert to fraction form
    72,831.20/109,279.20 = 26,117.60/x
  3. Step 3: Cross multiply
    72,831.20x = 109,279.20 × 26,117.60
  4. Step 4: Simplify right side
    72,831.20x = 2,854,110,433.92
  5. Step 5: Solve for x
    x = 2,854,110,433.92/72,831.20
  6. Step 6: Final answer
    x = 39,188.02

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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.