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Finding the Fourth Proportional to 84,248.56, 126,372.78 and 21,919.06

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Solution

The fourth proportional to 84,248.56, 126,372.78 and 21,919.06 is: 32,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,248.56 : 126,372.78 = 21,919.06 : x
  2. Step 2: Convert to fraction form
    84,248.56/126,372.78 = 21,919.06/x
  3. Step 3: Cross multiply
    84,248.56x = 126,372.78 × 21,919.06
  4. Step 4: Simplify right side
    84,248.56x = 2,769,972,547.19
  5. Step 5: Solve for x
    x = 2,769,972,547.19/84,248.56
  6. Step 6: Final answer
    x = 32,878.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.