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Finding the Fourth Proportional to 42,790.80, 64,201.41 and 19,096.20

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Solution

The fourth proportional to 42,790.80, 64,201.41 and 19,096.20 is: 28,651.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,790.80 : 64,201.41 = 19,096.20 : x
  2. Step 2: Convert to fraction form
    42,790.80/64,201.41 = 19,096.20/x
  3. Step 3: Cross multiply
    42,790.80x = 64,201.41 × 19,096.20
  4. Step 4: Simplify right side
    42,790.80x = 1,226,002,965.64
  5. Step 5: Solve for x
    x = 1,226,002,965.64/42,790.80
  6. Step 6: Final answer
    x = 28,651.09

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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.