Home / 87,679.13-121,009.05-49,446.54

Finding the Fourth Proportional to 87,679.13, 121,009.05 and 49,446.54

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Solution

The fourth proportional to 87,679.13, 121,009.05 and 49,446.54 is: 68,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,679.13 : 121,009.05 = 49,446.54 : x
  2. Step 2: Convert to fraction form
    87,679.13/121,009.05 = 49,446.54/x
  3. Step 3: Cross multiply
    87,679.13x = 121,009.05 × 49,446.54
  4. Step 4: Simplify right side
    87,679.13x = 5,983,478,831.19
  5. Step 5: Solve for x
    x = 5,983,478,831.19/87,679.13
  6. Step 6: Final answer
    x = 68,242.91

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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.