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Finding the Fourth Proportional to 248,335.86, 342,705 and 135,159.78

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Solution

The fourth proportional to 248,335.86, 342,705 and 135,159.78 is: 186,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,335.86 : 342,705 = 135,159.78 : x
  2. Step 2: Convert to fraction form
    248,335.86/342,705 = 135,159.78/x
  3. Step 3: Cross multiply
    248,335.86x = 342,705 × 135,159.78
  4. Step 4: Simplify right side
    248,335.86x = 46,319,932,404.90
  5. Step 5: Solve for x
    x = 46,319,932,404.90/248,335.86
  6. Step 6: Final answer
    x = 186,521.32

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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.