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Finding the Fourth Proportional to 83,488.50, 125,240.04 and 21,159

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Solution

The fourth proportional to 83,488.50, 125,240.04 and 21,159 is: 31,740.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,488.50 : 125,240.04 = 21,159 : x
  2. Step 2: Convert to fraction form
    83,488.50/125,240.04 = 21,159/x
  3. Step 3: Cross multiply
    83,488.50x = 125,240.04 × 21,159
  4. Step 4: Simplify right side
    83,488.50x = 2,649,954,006.36
  5. Step 5: Solve for x
    x = 2,649,954,006.36/83,488.50
  6. Step 6: Final answer
    x = 31,740.35

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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.