Home / 86,289.21-129,455.38-68,586.66

Finding the Fourth Proportional to 86,289.21, 129,455.38 and 68,586.66

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Solution

The fourth proportional to 86,289.21, 129,455.38 and 68,586.66 is: 102,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289.21 : 129,455.38 = 68,586.66 : x
  2. Step 2: Convert to fraction form
    86,289.21/129,455.38 = 68,586.66/x
  3. Step 3: Cross multiply
    86,289.21x = 129,455.38 × 68,586.66
  4. Step 4: Simplify right side
    86,289.21x = 8,878,912,218.96
  5. Step 5: Solve for x
    x = 8,878,912,218.96/86,289.21
  6. Step 6: Final answer
    x = 102,897.13

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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.