Home / 81,110.57-121,608.54-31,148.55

Finding the Fourth Proportional to 81,110.57, 121,608.54 and 31,148.55

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Solution

The fourth proportional to 81,110.57, 121,608.54 and 31,148.55 is: 46,700.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,110.57 : 121,608.54 = 31,148.55 : x
  2. Step 2: Convert to fraction form
    81,110.57/121,608.54 = 31,148.55/x
  3. Step 3: Cross multiply
    81,110.57x = 121,608.54 × 31,148.55
  4. Step 4: Simplify right side
    81,110.57x = 3,787,929,688.62
  5. Step 5: Solve for x
    x = 3,787,929,688.62/81,110.57
  6. Step 6: Final answer
    x = 46,700.82

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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.