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Finding the Fourth Proportional to 86,647.70, 129,983.93 and 26,681.24

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Solution

The fourth proportional to 86,647.70, 129,983.93 and 26,681.24 is: 40,025.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,647.70 : 129,983.93 = 26,681.24 : x
  2. Step 2: Convert to fraction form
    86,647.70/129,983.93 = 26,681.24/x
  3. Step 3: Cross multiply
    86,647.70x = 129,983.93 × 26,681.24
  4. Step 4: Simplify right side
    86,647.70x = 3,468,131,649.15
  5. Step 5: Solve for x
    x = 3,468,131,649.15/86,647.70
  6. Step 6: Final answer
    x = 40,025.67

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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.