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Finding the Fourth Proportional to 136,843.79, 188,790.80 and 79,473.30

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Solution

The fourth proportional to 136,843.79, 188,790.80 and 79,473.30 is: 109,642.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,843.79 : 188,790.80 = 79,473.30 : x
  2. Step 2: Convert to fraction form
    136,843.79/188,790.80 = 79,473.30/x
  3. Step 3: Cross multiply
    136,843.79x = 188,790.80 × 79,473.30
  4. Step 4: Simplify right side
    136,843.79x = 15,003,827,488.27
  5. Step 5: Solve for x
    x = 15,003,827,488.27/136,843.79
  6. Step 6: Final answer
    x = 109,642.01

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1.5x scale

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.