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Finding the Fourth Proportional to 107,940.90, 148,959.90 and 62,621.40

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Solution

The fourth proportional to 107,940.90, 148,959.90 and 62,621.40 is: 86,418.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,940.90 : 148,959.90 = 62,621.40 : x
  2. Step 2: Convert to fraction form
    107,940.90/148,959.90 = 62,621.40/x
  3. Step 3: Cross multiply
    107,940.90x = 148,959.90 × 62,621.40
  4. Step 4: Simplify right side
    107,940.90x = 9,328,077,481.86
  5. Step 5: Solve for x
    x = 9,328,077,481.86/107,940.90
  6. Step 6: Final answer
    x = 86,418.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.