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Finding the Fourth Proportional to 91,950.34, 137,993.95 and 68,312.92

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Solution

The fourth proportional to 91,950.34, 137,993.95 and 68,312.92 is: 102,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,950.34 : 137,993.95 = 68,312.92 : x
  2. Step 2: Convert to fraction form
    91,950.34/137,993.95 = 68,312.92/x
  3. Step 3: Cross multiply
    91,950.34x = 137,993.95 × 68,312.92
  4. Step 4: Simplify right side
    91,950.34x = 9,426,769,407.24
  5. Step 5: Solve for x
    x = 9,426,769,407.24/91,950.34
  6. Step 6: Final answer
    x = 102,520.23

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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.