Home / 78,091.32-107,766-42,281.64

Finding the Fourth Proportional to 78,091.32, 107,766 and 42,281.64

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Solution

The fourth proportional to 78,091.32, 107,766 and 42,281.64 is: 58,348.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.32 : 107,766 = 42,281.64 : x
  2. Step 2: Convert to fraction form
    78,091.32/107,766 = 42,281.64/x
  3. Step 3: Cross multiply
    78,091.32x = 107,766 × 42,281.64
  4. Step 4: Simplify right side
    78,091.32x = 4,556,523,216.24
  5. Step 5: Solve for x
    x = 4,556,523,216.24/78,091.32
  6. Step 6: Final answer
    x = 58,348.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.