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Finding the Fourth Proportional to 83,387.95, 115,092.74 and 76,662.92

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Solution

The fourth proportional to 83,387.95, 115,092.74 and 76,662.92 is: 105,810.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,387.95 : 115,092.74 = 76,662.92 : x
  2. Step 2: Convert to fraction form
    83,387.95/115,092.74 = 76,662.92/x
  3. Step 3: Cross multiply
    83,387.95x = 115,092.74 × 76,662.92
  4. Step 4: Simplify right side
    83,387.95x = 8,823,345,998.59
  5. Step 5: Solve for x
    x = 8,823,345,998.59/83,387.95
  6. Step 6: Final answer
    x = 105,810.81

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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.