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Finding the Fourth Proportional to 100,682.61, 138,945.57 and 55,364.04

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Solution

The fourth proportional to 100,682.61, 138,945.57 and 55,364.04 is: 76,404.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,682.61 : 138,945.57 = 55,364.04 : x
  2. Step 2: Convert to fraction form
    100,682.61/138,945.57 = 55,364.04/x
  3. Step 3: Cross multiply
    100,682.61x = 138,945.57 × 55,364.04
  4. Step 4: Simplify right side
    100,682.61x = 7,692,588,095.30
  5. Step 5: Solve for x
    x = 7,692,588,095.30/100,682.61
  6. Step 6: Final answer
    x = 76,404.34

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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.