Home / 81,288.17-121,919.67-31,360.98

Finding the Fourth Proportional to 81,288.17, 121,919.67 and 31,360.98

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Solution

The fourth proportional to 81,288.17, 121,919.67 and 31,360.98 is: 47,036.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,288.17 : 121,919.67 = 31,360.98 : x
  2. Step 2: Convert to fraction form
    81,288.17/121,919.67 = 31,360.98/x
  3. Step 3: Cross multiply
    81,288.17x = 121,919.67 × 31,360.98
  4. Step 4: Simplify right side
    81,288.17x = 3,823,520,332.48
  5. Step 5: Solve for x
    x = 3,823,520,332.48/81,288.17
  6. Step 6: Final answer
    x = 47,036.62

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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.