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Finding the Fourth Proportional to 67,569.60, 101,320.40 and 20,816.40

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Solution

The fourth proportional to 67,569.60, 101,320.40 and 20,816.40 is: 31,214.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,569.60 : 101,320.40 = 20,816.40 : x
  2. Step 2: Convert to fraction form
    67,569.60/101,320.40 = 20,816.40/x
  3. Step 3: Cross multiply
    67,569.60x = 101,320.40 × 20,816.40
  4. Step 4: Simplify right side
    67,569.60x = 2,109,125,974.56
  5. Step 5: Solve for x
    x = 2,109,125,974.56/67,569.60
  6. Step 6: Final answer
    x = 31,214.13

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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.