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Finding the Fourth Proportional to 100,275.99, 150,247.21 and 70,631.20

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Solution

The fourth proportional to 100,275.99, 150,247.21 and 70,631.20 is: 105,829.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,275.99 : 150,247.21 = 70,631.20 : x
  2. Step 2: Convert to fraction form
    100,275.99/150,247.21 = 70,631.20/x
  3. Step 3: Cross multiply
    100,275.99x = 150,247.21 × 70,631.20
  4. Step 4: Simplify right side
    100,275.99x = 10,612,140,738.95
  5. Step 5: Solve for x
    x = 10,612,140,738.95/100,275.99
  6. Step 6: Final answer
    x = 105,829.33

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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.