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Finding the Fourth Proportional to 223,959.84, 309,104.88 and 128,498.16

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Solution

The fourth proportional to 223,959.84, 309,104.88 and 128,498.16 is: 177,350.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,959.84 : 309,104.88 = 128,498.16 : x
  2. Step 2: Convert to fraction form
    223,959.84/309,104.88 = 128,498.16/x
  3. Step 3: Cross multiply
    223,959.84x = 309,104.88 × 128,498.16
  4. Step 4: Simplify right side
    223,959.84x = 39,719,408,327.02
  5. Step 5: Solve for x
    x = 39,719,408,327.02/223,959.84
  6. Step 6: Final answer
    x = 177,350.58

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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.