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Finding the Fourth Proportional to 100,848.56, 139,209.09 and 79,282.04

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Solution

The fourth proportional to 100,848.56, 139,209.09 and 79,282.04 is: 109,439.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,848.56 : 139,209.09 = 79,282.04 : x
  2. Step 2: Convert to fraction form
    100,848.56/139,209.09 = 79,282.04/x
  3. Step 3: Cross multiply
    100,848.56x = 139,209.09 × 79,282.04
  4. Step 4: Simplify right side
    100,848.56x = 11,036,780,989.77
  5. Step 5: Solve for x
    x = 11,036,780,989.77/100,848.56
  6. Step 6: Final answer
    x = 109,439.15

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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.