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Finding the Fourth Proportional to 136,858.39, 188,862.68 and 79,530.10

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Solution

The fourth proportional to 136,858.39, 188,862.68 and 79,530.10 is: 109,750.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,858.39 : 188,862.68 = 79,530.10 : x
  2. Step 2: Convert to fraction form
    136,858.39/188,862.68 = 79,530.10/x
  3. Step 3: Cross multiply
    136,858.39x = 188,862.68 × 79,530.10
  4. Step 4: Simplify right side
    136,858.39x = 15,020,266,956.86
  5. Step 5: Solve for x
    x = 15,020,266,956.86/136,858.39
  6. Step 6: Final answer
    x = 109,750.43

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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.