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Finding the Fourth Proportional to 138,437.88, 191,117.72 and 110,914.48

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Solution

The fourth proportional to 138,437.88, 191,117.72 and 110,914.48 is: 153,120.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,437.88 : 191,117.72 = 110,914.48 : x
  2. Step 2: Convert to fraction form
    138,437.88/191,117.72 = 110,914.48/x
  3. Step 3: Cross multiply
    138,437.88x = 191,117.72 × 110,914.48
  4. Step 4: Simplify right side
    138,437.88x = 21,197,722,532.59
  5. Step 5: Solve for x
    x = 21,197,722,532.59/138,437.88
  6. Step 6: Final answer
    x = 153,120.83

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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.