Home / 81,144.24-121,726.08-31,212.72

Finding the Fourth Proportional to 81,144.24, 121,726.08 and 31,212.72

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Solution

The fourth proportional to 81,144.24, 121,726.08 and 31,212.72 is: 46,822.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.24 : 121,726.08 = 31,212.72 : x
  2. Step 2: Convert to fraction form
    81,144.24/121,726.08 = 31,212.72/x
  3. Step 3: Cross multiply
    81,144.24x = 121,726.08 × 31,212.72
  4. Step 4: Simplify right side
    81,144.24x = 3,799,402,051.74
  5. Step 5: Solve for x
    x = 3,799,402,051.74/81,144.24
  6. Step 6: Final answer
    x = 46,822.82

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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.