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Finding the Fourth Proportional to 245,612.71, 338,940.48 and 138,181.60

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Solution

The fourth proportional to 245,612.71, 338,940.48 and 138,181.60 is: 190,687.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,612.71 : 338,940.48 = 138,181.60 : x
  2. Step 2: Convert to fraction form
    245,612.71/338,940.48 = 138,181.60/x
  3. Step 3: Cross multiply
    245,612.71x = 338,940.48 × 138,181.60
  4. Step 4: Simplify right side
    245,612.71x = 46,835,337,831.17
  5. Step 5: Solve for x
    x = 46,835,337,831.17/245,612.71
  6. Step 6: Final answer
    x = 190,687.76

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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.