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Finding the Fourth Proportional to 83,608.96, 125,411.80 and 20,429.52

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Solution

The fourth proportional to 83,608.96, 125,411.80 and 20,429.52 is: 30,643.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,608.96 : 125,411.80 = 20,429.52 : x
  2. Step 2: Convert to fraction form
    83,608.96/125,411.80 = 20,429.52/x
  3. Step 3: Cross multiply
    83,608.96x = 125,411.80 × 20,429.52
  4. Step 4: Simplify right side
    83,608.96x = 2,562,102,876.34
  5. Step 5: Solve for x
    x = 2,562,102,876.34/83,608.96
  6. Step 6: Final answer
    x = 30,643.88

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1.5x scale

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.