Home / 78,257.66-117,186.12-43,158.38

Finding the Fourth Proportional to 78,257.66, 117,186.12 and 43,158.38

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Solution

The fourth proportional to 78,257.66, 117,186.12 and 43,158.38 is: 64,627.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,257.66 : 117,186.12 = 43,158.38 : x
  2. Step 2: Convert to fraction form
    78,257.66/117,186.12 = 43,158.38/x
  3. Step 3: Cross multiply
    78,257.66x = 117,186.12 × 43,158.38
  4. Step 4: Simplify right side
    78,257.66x = 5,057,563,097.69
  5. Step 5: Solve for x
    x = 5,057,563,097.69/78,257.66
  6. Step 6: Final answer
    x = 64,627.07

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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.