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Finding the Fourth Proportional to 83,042.59, 124,563.89 and 20,713.09

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Solution

The fourth proportional to 83,042.59, 124,563.89 and 20,713.09 is: 31,069.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,042.59 : 124,563.89 = 20,713.09 : x
  2. Step 2: Convert to fraction form
    83,042.59/124,563.89 = 20,713.09/x
  3. Step 3: Cross multiply
    83,042.59x = 124,563.89 × 20,713.09
  4. Step 4: Simplify right side
    83,042.59x = 2,580,103,064.32
  5. Step 5: Solve for x
    x = 2,580,103,064.32/83,042.59
  6. Step 6: Final answer
    x = 31,069.64

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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.