Home / 78,486.27-117,781.74-28,566.36

Finding the Fourth Proportional to 78,486.27, 117,781.74 and 28,566.36

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Solution

The fourth proportional to 78,486.27, 117,781.74 and 28,566.36 is: 42,868.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.27 : 117,781.74 = 28,566.36 : x
  2. Step 2: Convert to fraction form
    78,486.27/117,781.74 = 28,566.36/x
  3. Step 3: Cross multiply
    78,486.27x = 117,781.74 × 28,566.36
  4. Step 4: Simplify right side
    78,486.27x = 3,364,595,586.27
  5. Step 5: Solve for x
    x = 3,364,595,586.27/78,486.27
  6. Step 6: Final answer
    x = 42,868.59

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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.