Home / 78,022.28-117,032.88-31,274.48

Finding the Fourth Proportional to 78,022.28, 117,032.88 and 31,274.48

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Solution

The fourth proportional to 78,022.28, 117,032.88 and 31,274.48 is: 46,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,022.28 : 117,032.88 = 31,274.48 : x
  2. Step 2: Convert to fraction form
    78,022.28/117,032.88 = 31,274.48/x
  3. Step 3: Cross multiply
    78,022.28x = 117,032.88 × 31,274.48
  4. Step 4: Simplify right side
    78,022.28x = 3,660,142,464.90
  5. Step 5: Solve for x
    x = 3,660,142,464.90/78,022.28
  6. Step 6: Final answer
    x = 46,911.50

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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.