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Finding the Fourth Proportional to 138,956.75, 191,686.35 and 84,525.56

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Solution

The fourth proportional to 138,956.75, 191,686.35 and 84,525.56 is: 116,600.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,956.75 : 191,686.35 = 84,525.56 : x
  2. Step 2: Convert to fraction form
    138,956.75/191,686.35 = 84,525.56/x
  3. Step 3: Cross multiply
    138,956.75x = 191,686.35 × 84,525.56
  4. Step 4: Simplify right side
    138,956.75x = 16,202,395,680.01
  5. Step 5: Solve for x
    x = 16,202,395,680.01/138,956.75
  6. Step 6: Final answer
    x = 116,600.28

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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.