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Finding the Fourth Proportional to 216,864.80, 325,143.60 and 83,693.60

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Solution

The fourth proportional to 216,864.80, 325,143.60 and 83,693.60 is: 125,481.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,864.80 : 325,143.60 = 83,693.60 : x
  2. Step 2: Convert to fraction form
    216,864.80/325,143.60 = 83,693.60/x
  3. Step 3: Cross multiply
    216,864.80x = 325,143.60 × 83,693.60
  4. Step 4: Simplify right side
    216,864.80x = 27,212,438,400.96
  5. Step 5: Solve for x
    x = 27,212,438,400.96/216,864.80
  6. Step 6: Final answer
    x = 125,481.12

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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.