Home / 78,342.20-117,513.30-75,280.40

Finding the Fourth Proportional to 78,342.20, 117,513.30 and 75,280.40

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Solution

The fourth proportional to 78,342.20, 117,513.30 and 75,280.40 is: 112,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.20 : 117,513.30 = 75,280.40 : x
  2. Step 2: Convert to fraction form
    78,342.20/117,513.30 = 75,280.40/x
  3. Step 3: Cross multiply
    78,342.20x = 117,513.30 × 75,280.40
  4. Step 4: Simplify right side
    78,342.20x = 8,846,448,229.32
  5. Step 5: Solve for x
    x = 8,846,448,229.32/78,342.20
  6. Step 6: Final answer
    x = 112,920.60

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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.