Home / 81,255.80-121,752.47-31,277.38

Finding the Fourth Proportional to 81,255.80, 121,752.47 and 31,277.38

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Solution

The fourth proportional to 81,255.80, 121,752.47 and 31,277.38 is: 46,865.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.80 : 121,752.47 = 31,277.38 : x
  2. Step 2: Convert to fraction form
    81,255.80/121,752.47 = 31,277.38/x
  3. Step 3: Cross multiply
    81,255.80x = 121,752.47 × 31,277.38
  4. Step 4: Simplify right side
    81,255.80x = 3,808,098,043.94
  5. Step 5: Solve for x
    x = 3,808,098,043.94/81,255.80
  6. Step 6: Final answer
    x = 46,865.56

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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.