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Finding the Fourth Proportional to 235,286.71, 352,774.04 and 85,509.20

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Solution

The fourth proportional to 235,286.71, 352,774.04 and 85,509.20 is: 128,207.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,286.71 : 352,774.04 = 85,509.20 : x
  2. Step 2: Convert to fraction form
    235,286.71/352,774.04 = 85,509.20/x
  3. Step 3: Cross multiply
    235,286.71x = 352,774.04 × 85,509.20
  4. Step 4: Simplify right side
    235,286.71x = 30,165,426,395.56
  5. Step 5: Solve for x
    x = 30,165,426,395.56/235,286.71
  6. Step 6: Final answer
    x = 128,207.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.