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Finding the Fourth Proportional to 100,960.84, 139,326.92 and 55,640.48

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Solution

The fourth proportional to 100,960.84, 139,326.92 and 55,640.48 is: 76,784.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,960.84 : 139,326.92 = 55,640.48 : x
  2. Step 2: Convert to fraction form
    100,960.84/139,326.92 = 55,640.48/x
  3. Step 3: Cross multiply
    100,960.84x = 139,326.92 × 55,640.48
  4. Step 4: Simplify right side
    100,960.84x = 7,752,217,193.14
  5. Step 5: Solve for x
    x = 7,752,217,193.14/100,960.84
  6. Step 6: Final answer
    x = 76,784.40

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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.