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Finding the Fourth Proportional to 216,918.80, 325,426.80 and 83,787.20

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Solution

The fourth proportional to 216,918.80, 325,426.80 and 83,787.20 is: 125,699.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,918.80 : 325,426.80 = 83,787.20 : x
  2. Step 2: Convert to fraction form
    216,918.80/325,426.80 = 83,787.20/x
  3. Step 3: Cross multiply
    216,918.80x = 325,426.80 × 83,787.20
  4. Step 4: Simplify right side
    216,918.80x = 27,266,600,376.96
  5. Step 5: Solve for x
    x = 27,266,600,376.96/216,918.80
  6. Step 6: Final answer
    x = 125,699.57

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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.