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Finding the Fourth Proportional to 81,785.98, 122,678.82 and 25,630.39

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Solution

The fourth proportional to 81,785.98, 122,678.82 and 25,630.39 is: 38,445.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,785.98 : 122,678.82 = 25,630.39 : x
  2. Step 2: Convert to fraction form
    81,785.98/122,678.82 = 25,630.39/x
  3. Step 3: Cross multiply
    81,785.98x = 122,678.82 × 25,630.39
  4. Step 4: Simplify right side
    81,785.98x = 3,144,306,001.34
  5. Step 5: Solve for x
    x = 3,144,306,001.34/81,785.98
  6. Step 6: Final answer
    x = 38,445.54

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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.