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Finding the Fourth Proportional to 85,108.77, 117,470.79 and 49,293

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Solution

The fourth proportional to 85,108.77, 117,470.79 and 49,293 is: 68,036.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,108.77 : 117,470.79 = 49,293 : x
  2. Step 2: Convert to fraction form
    85,108.77/117,470.79 = 49,293/x
  3. Step 3: Cross multiply
    85,108.77x = 117,470.79 × 49,293
  4. Step 4: Simplify right side
    85,108.77x = 5,790,487,651.47
  5. Step 5: Solve for x
    x = 5,790,487,651.47/85,108.77
  6. Step 6: Final answer
    x = 68,036.32

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1.5x scale

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.