Home / 78,167,872.23-117,252,792.51-20,659,635.60

Finding the Fourth Proportional to 78,167,872.23, 117,252,792.51 and 20,659,635.60

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Solution

The fourth proportional to 78,167,872.23, 117,252,792.51 and 20,659,635.60 is: 30,989,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,167,872.23 : 117,252,792.51 = 20,659,635.60 : x
  2. Step 2: Convert to fraction form
    78,167,872.23/117,252,792.51 = 20,659,635.60/x
  3. Step 3: Cross multiply
    78,167,872.23x = 117,252,792.51 × 20,659,635.60
  4. Step 4: Simplify right side
    78,167,872.23x = 2,422,399,966,339,009.50
  5. Step 5: Solve for x
    x = 2,422,399,966,339,009.50/78,167,872.23
  6. Step 6: Final answer
    x = 30,989,713.51

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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.