Home / 81,761.20-112,831.68-47,778.64

Finding the Fourth Proportional to 81,761.20, 112,831.68 and 47,778.64

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Solution

The fourth proportional to 81,761.20, 112,831.68 and 47,778.64 is: 65,935.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,761.20 : 112,831.68 = 47,778.64 : x
  2. Step 2: Convert to fraction form
    81,761.20/112,831.68 = 47,778.64/x
  3. Step 3: Cross multiply
    81,761.20x = 112,831.68 × 47,778.64
  4. Step 4: Simplify right side
    81,761.20x = 5,390,944,219.32
  5. Step 5: Solve for x
    x = 5,390,944,219.32/81,761.20
  6. Step 6: Final answer
    x = 65,935.24

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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.