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Finding the Fourth Proportional to 100,911.60, 151,367.40 and 90,025.20

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Solution

The fourth proportional to 100,911.60, 151,367.40 and 90,025.20 is: 135,037.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,911.60 : 151,367.40 = 90,025.20 : x
  2. Step 2: Convert to fraction form
    100,911.60/151,367.40 = 90,025.20/x
  3. Step 3: Cross multiply
    100,911.60x = 151,367.40 × 90,025.20
  4. Step 4: Simplify right side
    100,911.60x = 13,626,880,458.48
  5. Step 5: Solve for x
    x = 13,626,880,458.48/100,911.60
  6. Step 6: Final answer
    x = 135,037.80

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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.