Home / 81,081.72-121,591.56-38,950.08

Finding the Fourth Proportional to 81,081.72, 121,591.56 and 38,950.08

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Solution

The fourth proportional to 81,081.72, 121,591.56 and 38,950.08 is: 58,410.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.72 : 121,591.56 = 38,950.08 : x
  2. Step 2: Convert to fraction form
    81,081.72/121,591.56 = 38,950.08/x
  3. Step 3: Cross multiply
    81,081.72x = 121,591.56 × 38,950.08
  4. Step 4: Simplify right side
    81,081.72x = 4,736,000,989.32
  5. Step 5: Solve for x
    x = 4,736,000,989.32/81,081.72
  6. Step 6: Final answer
    x = 58,410.22

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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.