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Finding the Fourth Proportional to 91,444.31, 136,989 and 67,384.96

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Solution

The fourth proportional to 91,444.31, 136,989 and 67,384.96 is: 100,946.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,444.31 : 136,989 = 67,384.96 : x
  2. Step 2: Convert to fraction form
    91,444.31/136,989 = 67,384.96/x
  3. Step 3: Cross multiply
    91,444.31x = 136,989 × 67,384.96
  4. Step 4: Simplify right side
    91,444.31x = 9,230,998,285.44
  5. Step 5: Solve for x
    x = 9,230,998,285.44/91,444.31
  6. Step 6: Final answer
    x = 100,946.67

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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.