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Finding the Fourth Proportional to 83,570.46, 125,354.07 and 20,391

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Solution

The fourth proportional to 83,570.46, 125,354.07 and 20,391 is: 30,586.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,570.46 : 125,354.07 = 20,391 : x
  2. Step 2: Convert to fraction form
    83,570.46/125,354.07 = 20,391/x
  3. Step 3: Cross multiply
    83,570.46x = 125,354.07 × 20,391
  4. Step 4: Simplify right side
    83,570.46x = 2,556,094,841.37
  5. Step 5: Solve for x
    x = 2,556,094,841.37/83,570.46
  6. Step 6: Final answer
    x = 30,586.10

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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.