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Finding the Fourth Proportional to 86,300.69, 129,456.62 and 27,138.65

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Solution

The fourth proportional to 86,300.69, 129,456.62 and 27,138.65 is: 40,709.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,300.69 : 129,456.62 = 27,138.65 : x
  2. Step 2: Convert to fraction form
    86,300.69/129,456.62 = 27,138.65/x
  3. Step 3: Cross multiply
    86,300.69x = 129,456.62 × 27,138.65
  4. Step 4: Simplify right side
    86,300.69x = 3,513,277,900.36
  5. Step 5: Solve for x
    x = 3,513,277,900.36/86,300.69
  6. Step 6: Final answer
    x = 40,709.73

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1.5x scale

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.