Home / 78,454.20-117,695.40-28,604.23

Finding the Fourth Proportional to 78,454.20, 117,695.40 and 28,604.23

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Solution

The fourth proportional to 78,454.20, 117,695.40 and 28,604.23 is: 42,911.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,454.20 : 117,695.40 = 28,604.23 : x
  2. Step 2: Convert to fraction form
    78,454.20/117,695.40 = 28,604.23/x
  3. Step 3: Cross multiply
    78,454.20x = 117,695.40 × 28,604.23
  4. Step 4: Simplify right side
    78,454.20x = 3,366,586,291.54
  5. Step 5: Solve for x
    x = 3,366,586,291.54/78,454.20
  6. Step 6: Final answer
    x = 42,911.49

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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.