Home / 81,081.58-121,403.67-52,931.92

Finding the Fourth Proportional to 81,081.58, 121,403.67 and 52,931.92

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Solution

The fourth proportional to 81,081.58, 121,403.67 and 52,931.92 is: 79,255.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.58 : 121,403.67 = 52,931.92 : x
  2. Step 2: Convert to fraction form
    81,081.58/121,403.67 = 52,931.92/x
  3. Step 3: Cross multiply
    81,081.58x = 121,403.67 × 52,931.92
  4. Step 4: Simplify right side
    81,081.58x = 6,426,129,348.15
  5. Step 5: Solve for x
    x = 6,426,129,348.15/81,081.58
  6. Step 6: Final answer
    x = 79,255.11

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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.