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Finding the Fourth Proportional to 88,438.59, 122,121.11 and 85,578.87

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Solution

The fourth proportional to 88,438.59, 122,121.11 and 85,578.87 is: 118,172.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,438.59 : 122,121.11 = 85,578.87 : x
  2. Step 2: Convert to fraction form
    88,438.59/122,121.11 = 85,578.87/x
  3. Step 3: Cross multiply
    88,438.59x = 122,121.11 × 85,578.87
  4. Step 4: Simplify right side
    88,438.59x = 10,450,986,596.95
  5. Step 5: Solve for x
    x = 10,450,986,596.95/88,438.59
  6. Step 6: Final answer
    x = 118,172.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.