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Finding the Fourth Proportional to 20,199,799.20, 30,299,698.80 and 10,098,775.20

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Solution

The fourth proportional to 20,199,799.20, 30,299,698.80 and 10,098,775.20 is: 15,148,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199,799.20 : 30,299,698.80 = 10,098,775.20 : x
  2. Step 2: Convert to fraction form
    20,199,799.20/30,299,698.80 = 10,098,775.20/x
  3. Step 3: Cross multiply
    20,199,799.20x = 30,299,698.80 × 10,098,775.20
  4. Step 4: Simplify right side
    20,199,799.20x = 305,989,846,808,909.75
  5. Step 5: Solve for x
    x = 305,989,846,808,909.75/20,199,799.20
  6. Step 6: Final answer
    x = 15,148,162.80

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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.