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Finding the Fourth Proportional to 163,976.40, 226,281.60 and 100,310.40

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Solution

The fourth proportional to 163,976.40, 226,281.60 and 100,310.40 is: 138,424.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,976.40 : 226,281.60 = 100,310.40 : x
  2. Step 2: Convert to fraction form
    163,976.40/226,281.60 = 100,310.40/x
  3. Step 3: Cross multiply
    163,976.40x = 226,281.60 × 100,310.40
  4. Step 4: Simplify right side
    163,976.40x = 22,698,397,808.64
  5. Step 5: Solve for x
    x = 22,698,397,808.64/163,976.40
  6. Step 6: Final answer
    x = 138,424.78

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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.