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Finding the Fourth Proportional to 86,647.54, 129,975.94 and 27,487.78

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Solution

The fourth proportional to 86,647.54, 129,975.94 and 27,487.78 is: 41,233.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,647.54 : 129,975.94 = 27,487.78 : x
  2. Step 2: Convert to fraction form
    86,647.54/129,975.94 = 27,487.78/x
  3. Step 3: Cross multiply
    86,647.54x = 129,975.94 × 27,487.78
  4. Step 4: Simplify right side
    86,647.54x = 3,572,750,044.01
  5. Step 5: Solve for x
    x = 3,572,750,044.01/86,647.54
  6. Step 6: Final answer
    x = 41,233.14

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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.