Home / 81,695.24-122,550.40-31,779.12

Finding the Fourth Proportional to 81,695.24, 122,550.40 and 31,779.12

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Solution

The fourth proportional to 81,695.24, 122,550.40 and 31,779.12 is: 47,671.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,695.24 : 122,550.40 = 31,779.12 : x
  2. Step 2: Convert to fraction form
    81,695.24/122,550.40 = 31,779.12/x
  3. Step 3: Cross multiply
    81,695.24x = 122,550.40 × 31,779.12
  4. Step 4: Simplify right side
    81,695.24x = 3,894,543,867.65
  5. Step 5: Solve for x
    x = 3,894,543,867.65/81,695.24
  6. Step 6: Final answer
    x = 47,671.61

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1.5x scale

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.