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Finding the Fourth Proportional to 83,081.70, 124,622.55 and 56,509.65

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Solution

The fourth proportional to 83,081.70, 124,622.55 and 56,509.65 is: 84,764.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,081.70 : 124,622.55 = 56,509.65 : x
  2. Step 2: Convert to fraction form
    83,081.70/124,622.55 = 56,509.65/x
  3. Step 3: Cross multiply
    83,081.70x = 124,622.55 × 56,509.65
  4. Step 4: Simplify right side
    83,081.70x = 7,042,376,682.61
  5. Step 5: Solve for x
    x = 7,042,376,682.61/83,081.70
  6. Step 6: Final answer
    x = 84,764.48

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Similar ratio
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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.