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Finding the Fourth Proportional to 199,338.39, 299,132.10 and 81,009.68

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Solution

The fourth proportional to 199,338.39, 299,132.10 and 81,009.68 is: 121,565.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,338.39 : 299,132.10 = 81,009.68 : x
  2. Step 2: Convert to fraction form
    199,338.39/299,132.10 = 81,009.68/x
  3. Step 3: Cross multiply
    199,338.39x = 299,132.10 × 81,009.68
  4. Step 4: Simplify right side
    199,338.39x = 24,232,594,203.07
  5. Step 5: Solve for x
    x = 24,232,594,203.07/199,338.39
  6. Step 6: Final answer
    x = 121,565.11

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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.