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Finding the Fourth Proportional to 91,989.70, 137,911.65 and 50,436.70

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Solution

The fourth proportional to 91,989.70, 137,911.65 and 50,436.70 is: 75,615.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,989.70 : 137,911.65 = 50,436.70 : x
  2. Step 2: Convert to fraction form
    91,989.70/137,911.65 = 50,436.70/x
  3. Step 3: Cross multiply
    91,989.70x = 137,911.65 × 50,436.70
  4. Step 4: Simplify right side
    91,989.70x = 6,955,808,517.56
  5. Step 5: Solve for x
    x = 6,955,808,517.56/91,989.70
  6. Step 6: Final answer
    x = 75,615.08

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1.5x scale

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.