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Finding the Fourth Proportional to 109,355.41, 150,909.78 and 61,624.09

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Solution

The fourth proportional to 109,355.41, 150,909.78 and 61,624.09 is: 85,040.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,355.41 : 150,909.78 = 61,624.09 : x
  2. Step 2: Convert to fraction form
    109,355.41/150,909.78 = 61,624.09/x
  3. Step 3: Cross multiply
    109,355.41x = 150,909.78 × 61,624.09
  4. Step 4: Simplify right side
    109,355.41x = 9,299,677,864.60
  5. Step 5: Solve for x
    x = 9,299,677,864.60/109,355.41
  6. Step 6: Final answer
    x = 85,040.86

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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.