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Finding the Fourth Proportional to 84,242.57, 126,363.78 and 21,913.07

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Solution

The fourth proportional to 84,242.57, 126,363.78 and 21,913.07 is: 32,869.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,242.57 : 126,363.78 = 21,913.07 : x
  2. Step 2: Convert to fraction form
    84,242.57/126,363.78 = 21,913.07/x
  3. Step 3: Cross multiply
    84,242.57x = 126,363.78 × 21,913.07
  4. Step 4: Simplify right side
    84,242.57x = 2,769,017,724.79
  5. Step 5: Solve for x
    x = 2,769,017,724.79/84,242.57
  6. Step 6: Final answer
    x = 32,869.58

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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.