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Finding the Fourth Proportional to 223,624.64, 308,604.32 and 128,129.28

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Solution

The fourth proportional to 223,624.64, 308,604.32 and 128,129.28 is: 176,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,624.64 : 308,604.32 = 128,129.28 : x
  2. Step 2: Convert to fraction form
    223,624.64/308,604.32 = 128,129.28/x
  3. Step 3: Cross multiply
    223,624.64x = 308,604.32 × 128,129.28
  4. Step 4: Simplify right side
    223,624.64x = 39,541,249,326.49
  5. Step 5: Solve for x
    x = 39,541,249,326.49/223,624.64
  6. Step 6: Final answer
    x = 176,819.73

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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.