Home / 81,287.83-121,966.71-31,403.04

Finding the Fourth Proportional to 81,287.83, 121,966.71 and 31,403.04

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Solution

The fourth proportional to 81,287.83, 121,966.71 and 31,403.04 is: 47,118.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,287.83 : 121,966.71 = 31,403.04 : x
  2. Step 2: Convert to fraction form
    81,287.83/121,966.71 = 31,403.04/x
  3. Step 3: Cross multiply
    81,287.83x = 121,966.71 × 31,403.04
  4. Step 4: Simplify right side
    81,287.83x = 3,830,125,760.37
  5. Step 5: Solve for x
    x = 3,830,125,760.37/81,287.83
  6. Step 6: Final answer
    x = 47,118.07

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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.