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Finding the Fourth Proportional to 216,007.20, 324,010.80 and 122,695.20

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Solution

The fourth proportional to 216,007.20, 324,010.80 and 122,695.20 is: 184,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,007.20 : 324,010.80 = 122,695.20 : x
  2. Step 2: Convert to fraction form
    216,007.20/324,010.80 = 122,695.20/x
  3. Step 3: Cross multiply
    216,007.20x = 324,010.80 × 122,695.20
  4. Step 4: Simplify right side
    216,007.20x = 39,754,569,908.16
  5. Step 5: Solve for x
    x = 39,754,569,908.16/216,007.20
  6. Step 6: Final answer
    x = 184,042.80

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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.