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Finding the Fourth Proportional to 91,903.80, 137,855.70 and 45,247.80

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Solution

The fourth proportional to 91,903.80, 137,855.70 and 45,247.80 is: 67,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,903.80 : 137,855.70 = 45,247.80 : x
  2. Step 2: Convert to fraction form
    91,903.80/137,855.70 = 45,247.80/x
  3. Step 3: Cross multiply
    91,903.80x = 137,855.70 × 45,247.80
  4. Step 4: Simplify right side
    91,903.80x = 6,237,667,142.46
  5. Step 5: Solve for x
    x = 6,237,667,142.46/91,903.80
  6. Step 6: Final answer
    x = 67,871.70

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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.