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Finding the Fourth Proportional to 218,916.48, 328,374.73 and 100,687.26

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Solution

The fourth proportional to 218,916.48, 328,374.73 and 100,687.26 is: 151,030.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,916.48 : 328,374.73 = 100,687.26 : x
  2. Step 2: Convert to fraction form
    218,916.48/328,374.73 = 100,687.26/x
  3. Step 3: Cross multiply
    218,916.48x = 328,374.73 × 100,687.26
  4. Step 4: Simplify right side
    218,916.48x = 33,063,153,174.20
  5. Step 5: Solve for x
    x = 33,063,153,174.20/218,916.48
  6. Step 6: Final answer
    x = 151,030.90

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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.