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Finding the Fourth Proportional to 91,705.84, 137,355.54 and 70,489.66

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Solution

The fourth proportional to 91,705.84, 137,355.54 and 70,489.66 is: 105,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,705.84 : 137,355.54 = 70,489.66 : x
  2. Step 2: Convert to fraction form
    91,705.84/137,355.54 = 70,489.66/x
  3. Step 3: Cross multiply
    91,705.84x = 137,355.54 × 70,489.66
  4. Step 4: Simplify right side
    91,705.84x = 9,682,145,313.72
  5. Step 5: Solve for x
    x = 9,682,145,313.72/91,705.84
  6. Step 6: Final answer
    x = 105,578.29

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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.