Home / 42,745.21-64,115.89-28,711.15

Finding the Fourth Proportional to 42,745.21, 64,115.89 and 28,711.15

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Solution

The fourth proportional to 42,745.21, 64,115.89 and 28,711.15 is: 43,065.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,745.21 : 64,115.89 = 28,711.15 : x
  2. Step 2: Convert to fraction form
    42,745.21/64,115.89 = 28,711.15/x
  3. Step 3: Cross multiply
    42,745.21x = 64,115.89 × 28,711.15
  4. Step 4: Simplify right side
    42,745.21x = 1,840,840,703.11
  5. Step 5: Solve for x
    x = 1,840,840,703.11/42,745.21
  6. Step 6: Final answer
    x = 43,065.43

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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.