Home / 78,442.88-117,616.85-31,641.08

Finding the Fourth Proportional to 78,442.88, 117,616.85 and 31,641.08

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Solution

The fourth proportional to 78,442.88, 117,616.85 and 31,641.08 is: 47,442.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,442.88 : 117,616.85 = 31,641.08 : x
  2. Step 2: Convert to fraction form
    78,442.88/117,616.85 = 31,641.08/x
  3. Step 3: Cross multiply
    78,442.88x = 117,616.85 × 31,641.08
  4. Step 4: Simplify right side
    78,442.88x = 3,721,524,001.99
  5. Step 5: Solve for x
    x = 3,721,524,001.99/78,442.88
  6. Step 6: Final answer
    x = 47,442.47

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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.