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Finding the Fourth Proportional to 138,758.52, 191,442.06 and 84,987.48

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Solution

The fourth proportional to 138,758.52, 191,442.06 and 84,987.48 is: 117,255.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,758.52 : 191,442.06 = 84,987.48 : x
  2. Step 2: Convert to fraction form
    138,758.52/191,442.06 = 84,987.48/x
  3. Step 3: Cross multiply
    138,758.52x = 191,442.06 × 84,987.48
  4. Step 4: Simplify right side
    138,758.52x = 16,270,178,245.41
  5. Step 5: Solve for x
    x = 16,270,178,245.41/138,758.52
  6. Step 6: Final answer
    x = 117,255.35

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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.