Home / 78,278.08-117,431.16-36,724

Finding the Fourth Proportional to 78,278.08, 117,431.16 and 36,724

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Solution

The fourth proportional to 78,278.08, 117,431.16 and 36,724 is: 55,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.08 : 117,431.16 = 36,724 : x
  2. Step 2: Convert to fraction form
    78,278.08/117,431.16 = 36,724/x
  3. Step 3: Cross multiply
    78,278.08x = 117,431.16 × 36,724
  4. Step 4: Simplify right side
    78,278.08x = 4,312,541,919.84
  5. Step 5: Solve for x
    x = 4,312,541,919.84/78,278.08
  6. Step 6: Final answer
    x = 55,092.59

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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.