Home / 81,290.73-121,778.28-59,904.59

Finding the Fourth Proportional to 81,290.73, 121,778.28 and 59,904.59

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Solution

The fourth proportional to 81,290.73, 121,778.28 and 59,904.59 is: 89,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.73 : 121,778.28 = 59,904.59 : x
  2. Step 2: Convert to fraction form
    81,290.73/121,778.28 = 59,904.59/x
  3. Step 3: Cross multiply
    81,290.73x = 121,778.28 × 59,904.59
  4. Step 4: Simplify right side
    81,290.73x = 7,295,077,934.31
  5. Step 5: Solve for x
    x = 7,295,077,934.31/81,290.73
  6. Step 6: Final answer
    x = 89,740.59

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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.