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Finding the Fourth Proportional to 91,683.50, 137,656.67 and 68,063.90

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Solution

The fourth proportional to 91,683.50, 137,656.67 and 68,063.90 is: 102,193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,683.50 : 137,656.67 = 68,063.90 : x
  2. Step 2: Convert to fraction form
    91,683.50/137,656.67 = 68,063.90/x
  3. Step 3: Cross multiply
    91,683.50x = 137,656.67 × 68,063.90
  4. Step 4: Simplify right side
    91,683.50x = 9,369,448,792.61
  5. Step 5: Solve for x
    x = 9,369,448,792.61/91,683.50
  6. Step 6: Final answer
    x = 102,193.41

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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.