Home / 78,216.23-117,336.80-28,291.28

Finding the Fourth Proportional to 78,216.23, 117,336.80 and 28,291.28

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Solution

The fourth proportional to 78,216.23, 117,336.80 and 28,291.28 is: 42,441.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,216.23 : 117,336.80 = 28,291.28 : x
  2. Step 2: Convert to fraction form
    78,216.23/117,336.80 = 28,291.28/x
  3. Step 3: Cross multiply
    78,216.23x = 117,336.80 × 28,291.28
  4. Step 4: Simplify right side
    78,216.23x = 3,319,607,747.15
  5. Step 5: Solve for x
    x = 3,319,607,747.15/78,216.23
  6. Step 6: Final answer
    x = 42,441.42

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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.