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Finding the Fourth Proportional to 100,279.52, 138,385.60 and 54,960.32

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Solution

The fourth proportional to 100,279.52, 138,385.60 and 54,960.32 is: 75,845.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,279.52 : 138,385.60 = 54,960.32 : x
  2. Step 2: Convert to fraction form
    100,279.52/138,385.60 = 54,960.32/x
  3. Step 3: Cross multiply
    100,279.52x = 138,385.60 × 54,960.32
  4. Step 4: Simplify right side
    100,279.52x = 7,605,716,859.39
  5. Step 5: Solve for x
    x = 7,605,716,859.39/100,279.52
  6. Step 6: Final answer
    x = 75,845.17

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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.