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Finding the Fourth Proportional to 86,472, 129,711.98 and 26,496.18

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Solution

The fourth proportional to 86,472, 129,711.98 and 26,496.18 is: 39,745.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,472 : 129,711.98 = 26,496.18 : x
  2. Step 2: Convert to fraction form
    86,472/129,711.98 = 26,496.18/x
  3. Step 3: Cross multiply
    86,472x = 129,711.98 × 26,496.18
  4. Step 4: Simplify right side
    86,472x = 3,436,871,970.24
  5. Step 5: Solve for x
    x = 3,436,871,970.24/86,472
  6. Step 6: Final answer
    x = 39,745.49

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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.