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Finding the Fourth Proportional to 91,438.44, 136,944.38 and 88,915.54

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Solution

The fourth proportional to 91,438.44, 136,944.38 and 88,915.54 is: 133,165.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,438.44 : 136,944.38 = 88,915.54 : x
  2. Step 2: Convert to fraction form
    91,438.44/136,944.38 = 88,915.54/x
  3. Step 3: Cross multiply
    91,438.44x = 136,944.38 × 88,915.54
  4. Step 4: Simplify right side
    91,438.44x = 12,176,483,497.67
  5. Step 5: Solve for x
    x = 12,176,483,497.67/91,438.44
  6. Step 6: Final answer
    x = 133,165.91

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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.