Home / 81,098.85-121,674.30-38,981.98

Finding the Fourth Proportional to 81,098.85, 121,674.30 and 38,981.98

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Solution

The fourth proportional to 81,098.85, 121,674.30 and 38,981.98 is: 58,485.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.85 : 121,674.30 = 38,981.98 : x
  2. Step 2: Convert to fraction form
    81,098.85/121,674.30 = 38,981.98/x
  3. Step 3: Cross multiply
    81,098.85x = 121,674.30 × 38,981.98
  4. Step 4: Simplify right side
    81,098.85x = 4,743,105,129.11
  5. Step 5: Solve for x
    x = 4,743,105,129.11/81,098.85
  6. Step 6: Final answer
    x = 58,485.48

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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.