Home / 78,486.16-117,716.61-21,546.78

Finding the Fourth Proportional to 78,486.16, 117,716.61 and 21,546.78

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Solution

The fourth proportional to 78,486.16, 117,716.61 and 21,546.78 is: 32,316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.16 : 117,716.61 = 21,546.78 : x
  2. Step 2: Convert to fraction form
    78,486.16/117,716.61 = 21,546.78/x
  3. Step 3: Cross multiply
    78,486.16x = 117,716.61 × 21,546.78
  4. Step 4: Simplify right side
    78,486.16x = 2,536,413,898.02
  5. Step 5: Solve for x
    x = 2,536,413,898.02/78,486.16
  6. Step 6: Final answer
    x = 32,316.70

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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.