Home / 83,521.31-125,289.27-21,191.81

Finding the Fourth Proportional to 83,521.31, 125,289.27 and 21,191.81

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Solution

The fourth proportional to 83,521.31, 125,289.27 and 21,191.81 is: 31,789.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,521.31 : 125,289.27 = 21,191.81 : x
  2. Step 2: Convert to fraction form
    83,521.31/125,289.27 = 21,191.81/x
  3. Step 3: Cross multiply
    83,521.31x = 125,289.27 × 21,191.81
  4. Step 4: Simplify right side
    83,521.31x = 2,655,106,718.10
  5. Step 5: Solve for x
    x = 2,655,106,718.10/83,521.31
  6. Step 6: Final answer
    x = 31,789.57

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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.