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Finding the Fourth Proportional to 218,875.44, 328,363.92 and 69,130.56

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Solution

The fourth proportional to 218,875.44, 328,363.92 and 69,130.56 is: 103,711.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,875.44 : 328,363.92 = 69,130.56 : x
  2. Step 2: Convert to fraction form
    218,875.44/328,363.92 = 69,130.56/x
  3. Step 3: Cross multiply
    218,875.44x = 328,363.92 × 69,130.56
  4. Step 4: Simplify right side
    218,875.44x = 22,699,981,673.40
  5. Step 5: Solve for x
    x = 22,699,981,673.40/218,875.44
  6. Step 6: Final answer
    x = 103,711.87

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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.