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Finding the Fourth Proportional to 235,620.35, 325,163 and 128,197.30

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Solution

The fourth proportional to 235,620.35, 325,163 and 128,197.30 is: 176,916.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,620.35 : 325,163 = 128,197.30 : x
  2. Step 2: Convert to fraction form
    235,620.35/325,163 = 128,197.30/x
  3. Step 3: Cross multiply
    235,620.35x = 325,163 × 128,197.30
  4. Step 4: Simplify right side
    235,620.35x = 41,685,018,659.90
  5. Step 5: Solve for x
    x = 41,685,018,659.90/235,620.35
  6. Step 6: Final answer
    x = 176,916.04

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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.