Home / 81,050.91-121,582.20-31,131

Finding the Fourth Proportional to 81,050.91, 121,582.20 and 31,131

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Solution

The fourth proportional to 81,050.91, 121,582.20 and 31,131 is: 46,698.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,050.91 : 121,582.20 = 31,131 : x
  2. Step 2: Convert to fraction form
    81,050.91/121,582.20 = 31,131/x
  3. Step 3: Cross multiply
    81,050.91x = 121,582.20 × 31,131
  4. Step 4: Simplify right side
    81,050.91x = 3,784,975,468.20
  5. Step 5: Solve for x
    x = 3,784,975,468.20/81,050.91
  6. Step 6: Final answer
    x = 46,698.74

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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.