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Finding the Fourth Proportional to 83,285.72, 124,928.63 and 20,956.22

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Solution

The fourth proportional to 83,285.72, 124,928.63 and 20,956.22 is: 31,434.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,285.72 : 124,928.63 = 20,956.22 : x
  2. Step 2: Convert to fraction form
    83,285.72/124,928.63 = 20,956.22/x
  3. Step 3: Cross multiply
    83,285.72x = 124,928.63 × 20,956.22
  4. Step 4: Simplify right side
    83,285.72x = 2,618,031,672.22
  5. Step 5: Solve for x
    x = 2,618,031,672.22/83,285.72
  6. Step 6: Final answer
    x = 31,434.34

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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.