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Finding the Fourth Proportional to 100,115.16, 150,246.72 and 80,628.90

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Solution

The fourth proportional to 100,115.16, 150,246.72 and 80,628.90 is: 121,002.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,115.16 : 150,246.72 = 80,628.90 : x
  2. Step 2: Convert to fraction form
    100,115.16/150,246.72 = 80,628.90/x
  3. Step 3: Cross multiply
    100,115.16x = 150,246.72 × 80,628.90
  4. Step 4: Simplify right side
    100,115.16x = 12,114,227,762.21
  5. Step 5: Solve for x
    x = 12,114,227,762.21/100,115.16
  6. Step 6: Final answer
    x = 121,002.93

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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.