Home / 100,280.96-138,402.24-57,831.04

Finding the Fourth Proportional to 100,280.96, 138,402.24 and 57,831.04

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Solution

The fourth proportional to 100,280.96, 138,402.24 and 57,831.04 is: 79,815.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,280.96 : 138,402.24 = 57,831.04 : x
  2. Step 2: Convert to fraction form
    100,280.96/138,402.24 = 57,831.04/x
  3. Step 3: Cross multiply
    100,280.96x = 138,402.24 × 57,831.04
  4. Step 4: Simplify right side
    100,280.96x = 8,003,945,477.53
  5. Step 5: Solve for x
    x = 8,003,945,477.53/100,280.96
  6. Step 6: Final answer
    x = 79,815.21

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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.