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Finding the Fourth Proportional to 91,988.70, 137,910.15 and 50,435.70

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Solution

The fourth proportional to 91,988.70, 137,910.15 and 50,435.70 is: 75,613.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,988.70 : 137,910.15 = 50,435.70 : x
  2. Step 2: Convert to fraction form
    91,988.70/137,910.15 = 50,435.70/x
  3. Step 3: Cross multiply
    91,988.70x = 137,910.15 × 50,435.70
  4. Step 4: Simplify right side
    91,988.70x = 6,955,594,952.36
  5. Step 5: Solve for x
    x = 6,955,594,952.36/91,988.70
  6. Step 6: Final answer
    x = 75,613.58

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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.