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Finding the Fourth Proportional to 86,774.70, 130,162.05 and 67,091.70

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Solution

The fourth proportional to 86,774.70, 130,162.05 and 67,091.70 is: 100,637.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,774.70 : 130,162.05 = 67,091.70 : x
  2. Step 2: Convert to fraction form
    86,774.70/130,162.05 = 67,091.70/x
  3. Step 3: Cross multiply
    86,774.70x = 130,162.05 × 67,091.70
  4. Step 4: Simplify right side
    86,774.70x = 8,732,793,209.99
  5. Step 5: Solve for x
    x = 8,732,793,209.99/86,774.70
  6. Step 6: Final answer
    x = 100,637.55

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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.