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Finding the Fourth Proportional to 66,815.20, 100,223.64 and 20,065.36

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Solution

The fourth proportional to 66,815.20, 100,223.64 and 20,065.36 is: 30,098.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,815.20 : 100,223.64 = 20,065.36 : x
  2. Step 2: Convert to fraction form
    66,815.20/100,223.64 = 20,065.36/x
  3. Step 3: Cross multiply
    66,815.20x = 100,223.64 × 20,065.36
  4. Step 4: Simplify right side
    66,815.20x = 2,011,023,417.11
  5. Step 5: Solve for x
    x = 2,011,023,417.11/66,815.20
  6. Step 6: Final answer
    x = 30,098.29

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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.