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Finding the Fourth Proportional to 86,270.62, 129,419 and 27,100.74

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Solution

The fourth proportional to 86,270.62, 129,419 and 27,100.74 is: 40,655.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,270.62 : 129,419 = 27,100.74 : x
  2. Step 2: Convert to fraction form
    86,270.62/129,419 = 27,100.74/x
  3. Step 3: Cross multiply
    86,270.62x = 129,419 × 27,100.74
  4. Step 4: Simplify right side
    86,270.62x = 3,507,350,670.06
  5. Step 5: Solve for x
    x = 3,507,350,670.06/86,270.62
  6. Step 6: Final answer
    x = 40,655.22

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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.