Home / 78,228.64-117,355.20-28,303.48

Finding the Fourth Proportional to 78,228.64, 117,355.20 and 28,303.48

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Solution

The fourth proportional to 78,228.64, 117,355.20 and 28,303.48 is: 42,459.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,228.64 : 117,355.20 = 28,303.48 : x
  2. Step 2: Convert to fraction form
    78,228.64/117,355.20 = 28,303.48/x
  3. Step 3: Cross multiply
    78,228.64x = 117,355.20 × 28,303.48
  4. Step 4: Simplify right side
    78,228.64x = 3,321,560,556.10
  5. Step 5: Solve for x
    x = 3,321,560,556.10/78,228.64
  6. Step 6: Final answer
    x = 42,459.65

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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.