Home / 81,156.24-121,744.08-31,224.72

Finding the Fourth Proportional to 81,156.24, 121,744.08 and 31,224.72

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Solution

The fourth proportional to 81,156.24, 121,744.08 and 31,224.72 is: 46,840.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,156.24 : 121,744.08 = 31,224.72 : x
  2. Step 2: Convert to fraction form
    81,156.24/121,744.08 = 31,224.72/x
  3. Step 3: Cross multiply
    81,156.24x = 121,744.08 × 31,224.72
  4. Step 4: Simplify right side
    81,156.24x = 3,801,424,809.66
  5. Step 5: Solve for x
    x = 3,801,424,809.66/81,156.24
  6. Step 6: Final answer
    x = 46,840.82

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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.