Home / 81,444.12-121,609.11-72,955.83

Finding the Fourth Proportional to 81,444.12, 121,609.11 and 72,955.83

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Solution

The fourth proportional to 81,444.12, 121,609.11 and 72,955.83 is: 108,934.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,444.12 : 121,609.11 = 72,955.83 : x
  2. Step 2: Convert to fraction form
    81,444.12/121,609.11 = 72,955.83/x
  3. Step 3: Cross multiply
    81,444.12x = 121,609.11 × 72,955.83
  4. Step 4: Simplify right side
    81,444.12x = 8,872,093,555.61
  5. Step 5: Solve for x
    x = 8,872,093,555.61/81,444.12
  6. Step 6: Final answer
    x = 108,934.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.