Home / 78,468.20-117,716.40-28,618.23

Finding the Fourth Proportional to 78,468.20, 117,716.40 and 28,618.23

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Solution

The fourth proportional to 78,468.20, 117,716.40 and 28,618.23 is: 42,932.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468.20 : 117,716.40 = 28,618.23 : x
  2. Step 2: Convert to fraction form
    78,468.20/117,716.40 = 28,618.23/x
  3. Step 3: Cross multiply
    78,468.20x = 117,716.40 × 28,618.23
  4. Step 4: Simplify right side
    78,468.20x = 3,368,835,009.97
  5. Step 5: Solve for x
    x = 3,368,835,009.97/78,468.20
  6. Step 6: Final answer
    x = 42,932.49

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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.