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Finding the Fourth Proportional to 84,590.91, 127,480.89 and 76,167.72

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Solution

The fourth proportional to 84,590.91, 127,480.89 and 76,167.72 is: 114,786.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,590.91 : 127,480.89 = 76,167.72 : x
  2. Step 2: Convert to fraction form
    84,590.91/127,480.89 = 76,167.72/x
  3. Step 3: Cross multiply
    84,590.91x = 127,480.89 × 76,167.72
  4. Step 4: Simplify right side
    84,590.91x = 9,709,928,734.87
  5. Step 5: Solve for x
    x = 9,709,928,734.87/84,590.91
  6. Step 6: Final answer
    x = 114,786.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.