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Finding the Fourth Proportional to 138,995.54, 191,814.15 and 75,333.32

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Solution

The fourth proportional to 138,995.54, 191,814.15 and 75,333.32 is: 103,960.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,995.54 : 191,814.15 = 75,333.32 : x
  2. Step 2: Convert to fraction form
    138,995.54/191,814.15 = 75,333.32/x
  3. Step 3: Cross multiply
    138,995.54x = 191,814.15 × 75,333.32
  4. Step 4: Simplify right side
    138,995.54x = 14,449,996,742.48
  5. Step 5: Solve for x
    x = 14,449,996,742.48/138,995.54
  6. Step 6: Final answer
    x = 103,960.15

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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.