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Finding the Fourth Proportional to 121,660.40, 182,411.40 and 109,218.80

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Solution

The fourth proportional to 121,660.40, 182,411.40 and 109,218.80 is: 163,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,660.40 : 182,411.40 = 109,218.80 : x
  2. Step 2: Convert to fraction form
    121,660.40/182,411.40 = 109,218.80/x
  3. Step 3: Cross multiply
    121,660.40x = 182,411.40 × 109,218.80
  4. Step 4: Simplify right side
    121,660.40x = 19,922,754,214.32
  5. Step 5: Solve for x
    x = 19,922,754,214.32/121,660.40
  6. Step 6: Final answer
    x = 163,757.10

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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.