Home / 81,337.56-121,994.79-31,441.15

Finding the Fourth Proportional to 81,337.56, 121,994.79 and 31,441.15

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Solution

The fourth proportional to 81,337.56, 121,994.79 and 31,441.15 is: 47,157.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,337.56 : 121,994.79 = 31,441.15 : x
  2. Step 2: Convert to fraction form
    81,337.56/121,994.79 = 31,441.15/x
  3. Step 3: Cross multiply
    81,337.56x = 121,994.79 × 31,441.15
  4. Step 4: Simplify right side
    81,337.56x = 3,835,656,491.61
  5. Step 5: Solve for x
    x = 3,835,656,491.61/81,337.56
  6. Step 6: Final answer
    x = 47,157.26

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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.