Home / 78,230.64-117,358.20-28,305.48

Finding the Fourth Proportional to 78,230.64, 117,358.20 and 28,305.48

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Solution

The fourth proportional to 78,230.64, 117,358.20 and 28,305.48 is: 42,462.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,230.64 : 117,358.20 = 28,305.48 : x
  2. Step 2: Convert to fraction form
    78,230.64/117,358.20 = 28,305.48/x
  3. Step 3: Cross multiply
    78,230.64x = 117,358.20 × 28,305.48
  4. Step 4: Simplify right side
    78,230.64x = 3,321,880,182.94
  5. Step 5: Solve for x
    x = 3,321,880,182.94/78,230.64
  6. Step 6: Final answer
    x = 42,462.65

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1.5x scale

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.