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Finding the Fourth Proportional to 136,616.71, 188,530.70 and 76,187.42

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Solution

The fourth proportional to 136,616.71, 188,530.70 and 76,187.42 is: 105,138.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,616.71 : 188,530.70 = 76,187.42 : x
  2. Step 2: Convert to fraction form
    136,616.71/188,530.70 = 76,187.42/x
  3. Step 3: Cross multiply
    136,616.71x = 188,530.70 × 76,187.42
  4. Step 4: Simplify right side
    136,616.71x = 14,363,667,242.86
  5. Step 5: Solve for x
    x = 14,363,667,242.86/136,616.71
  6. Step 6: Final answer
    x = 105,138.44

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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.