Home / 42,781.10-64,169.85-11,190.66

Finding the Fourth Proportional to 42,781.10, 64,169.85 and 11,190.66

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Solution

The fourth proportional to 42,781.10, 64,169.85 and 11,190.66 is: 16,785.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,781.10 : 64,169.85 = 11,190.66 : x
  2. Step 2: Convert to fraction form
    42,781.10/64,169.85 = 11,190.66/x
  3. Step 3: Cross multiply
    42,781.10x = 64,169.85 × 11,190.66
  4. Step 4: Simplify right side
    42,781.10x = 718,102,774.93
  5. Step 5: Solve for x
    x = 718,102,774.93/42,781.10
  6. Step 6: Final answer
    x = 16,785.52

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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.