Home / 81,014.10-121,521.15-67,892.10

Finding the Fourth Proportional to 81,014.10, 121,521.15 and 67,892.10

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Solution

The fourth proportional to 81,014.10, 121,521.15 and 67,892.10 is: 101,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.10 : 121,521.15 = 67,892.10 : x
  2. Step 2: Convert to fraction form
    81,014.10/121,521.15 = 67,892.10/x
  3. Step 3: Cross multiply
    81,014.10x = 121,521.15 × 67,892.10
  4. Step 4: Simplify right side
    81,014.10x = 8,250,326,067.92
  5. Step 5: Solve for x
    x = 8,250,326,067.92/81,014.10
  6. Step 6: Final answer
    x = 101,838.15

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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.