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Finding the Fourth Proportional to 100,960.64, 139,326.62 and 55,640.24

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Solution

The fourth proportional to 100,960.64, 139,326.62 and 55,640.24 is: 76,784.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,960.64 : 139,326.62 = 55,640.24 : x
  2. Step 2: Convert to fraction form
    100,960.64/139,326.62 = 55,640.24/x
  3. Step 3: Cross multiply
    100,960.64x = 139,326.62 × 55,640.24
  4. Step 4: Simplify right side
    100,960.64x = 7,752,166,575.19
  5. Step 5: Solve for x
    x = 7,752,166,575.19/100,960.64
  6. Step 6: Final answer
    x = 76,784.05

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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.