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Finding the Fourth Proportional to 305,139.61, 421,117.48 and 169,216.14

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Solution

The fourth proportional to 305,139.61, 421,117.48 and 169,216.14 is: 233,532.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,139.61 : 421,117.48 = 169,216.14 : x
  2. Step 2: Convert to fraction form
    305,139.61/421,117.48 = 169,216.14/x
  3. Step 3: Cross multiply
    305,139.61x = 421,117.48 × 169,216.14
  4. Step 4: Simplify right side
    305,139.61x = 71,259,874,452.13
  5. Step 5: Solve for x
    x = 71,259,874,452.13/305,139.61
  6. Step 6: Final answer
    x = 233,532.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.