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Finding the Fourth Proportional to 138,482.52, 191,100.45 and 78,065.43

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Solution

The fourth proportional to 138,482.52, 191,100.45 and 78,065.43 is: 107,727.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,482.52 : 191,100.45 = 78,065.43 : x
  2. Step 2: Convert to fraction form
    138,482.52/191,100.45 = 78,065.43/x
  3. Step 3: Cross multiply
    138,482.52x = 191,100.45 × 78,065.43
  4. Step 4: Simplify right side
    138,482.52x = 14,918,338,802.44
  5. Step 5: Solve for x
    x = 14,918,338,802.44/138,482.52
  6. Step 6: Final answer
    x = 107,727.23

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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.