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Finding the Fourth Proportional to 42,793.70, 64,205.75 and 19,099.09

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Solution

The fourth proportional to 42,793.70, 64,205.75 and 19,099.09 is: 28,655.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,793.70 : 64,205.75 = 19,099.09 : x
  2. Step 2: Convert to fraction form
    42,793.70/64,205.75 = 19,099.09/x
  3. Step 3: Cross multiply
    42,793.70x = 64,205.75 × 19,099.09
  4. Step 4: Simplify right side
    42,793.70x = 1,226,271,418.34
  5. Step 5: Solve for x
    x = 1,226,271,418.34/42,793.70
  6. Step 6: Final answer
    x = 28,655.42

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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.