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Finding the Fourth Proportional to 100,657.99, 138,976.86 and 92,127.38

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Solution

The fourth proportional to 100,657.99, 138,976.86 and 92,127.38 is: 127,198.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,657.99 : 138,976.86 = 92,127.38 : x
  2. Step 2: Convert to fraction form
    100,657.99/138,976.86 = 92,127.38/x
  3. Step 3: Cross multiply
    100,657.99x = 138,976.86 × 92,127.38
  4. Step 4: Simplify right side
    100,657.99x = 12,803,573,643.02
  5. Step 5: Solve for x
    x = 12,803,573,643.02/100,657.99
  6. Step 6: Final answer
    x = 127,198.78

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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.