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Finding the Fourth Proportional to 101,399.40, 152,099.10 and 31,285.80

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Solution

The fourth proportional to 101,399.40, 152,099.10 and 31,285.80 is: 46,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,399.40 : 152,099.10 = 31,285.80 : x
  2. Step 2: Convert to fraction form
    101,399.40/152,099.10 = 31,285.80/x
  3. Step 3: Cross multiply
    101,399.40x = 152,099.10 × 31,285.80
  4. Step 4: Simplify right side
    101,399.40x = 4,758,542,022.78
  5. Step 5: Solve for x
    x = 4,758,542,022.78/101,399.40
  6. Step 6: Final answer
    x = 46,928.70

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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.