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Finding the Fourth Proportional to 138,306.52, 190,866.78 and 84,590.56

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Solution

The fourth proportional to 138,306.52, 190,866.78 and 84,590.56 is: 116,737.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,306.52 : 190,866.78 = 84,590.56 : x
  2. Step 2: Convert to fraction form
    138,306.52/190,866.78 = 84,590.56/x
  3. Step 3: Cross multiply
    138,306.52x = 190,866.78 × 84,590.56
  4. Step 4: Simplify right side
    138,306.52x = 16,145,527,805.60
  5. Step 5: Solve for x
    x = 16,145,527,805.60/138,306.52
  6. Step 6: Final answer
    x = 116,737.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.