Home / 42,106.96-63,159.86-12,121.92

Finding the Fourth Proportional to 42,106.96, 63,159.86 and 12,121.92

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Solution

The fourth proportional to 42,106.96, 63,159.86 and 12,121.92 is: 18,182.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,106.96 : 63,159.86 = 12,121.92 : x
  2. Step 2: Convert to fraction form
    42,106.96/63,159.86 = 12,121.92/x
  3. Step 3: Cross multiply
    42,106.96x = 63,159.86 × 12,121.92
  4. Step 4: Simplify right side
    42,106.96x = 765,618,770.13
  5. Step 5: Solve for x
    x = 765,618,770.13/42,106.96
  6. Step 6: Final answer
    x = 18,182.71

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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.