Home / 81,886.57-122,831.37-25,725.62

Finding the Fourth Proportional to 81,886.57, 122,831.37 and 25,725.62

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Solution

The fourth proportional to 81,886.57, 122,831.37 and 25,725.62 is: 38,588.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,886.57 : 122,831.37 = 25,725.62 : x
  2. Step 2: Convert to fraction form
    81,886.57/122,831.37 = 25,725.62/x
  3. Step 3: Cross multiply
    81,886.57x = 122,831.37 × 25,725.62
  4. Step 4: Simplify right side
    81,886.57x = 3,159,913,455.78
  5. Step 5: Solve for x
    x = 3,159,913,455.78/81,886.57
  6. Step 6: Final answer
    x = 38,588.91

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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.