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Finding the Fourth Proportional to 235,208.40, 352,700.92 and 85,429.20

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Solution

The fourth proportional to 235,208.40, 352,700.92 and 85,429.20 is: 128,103.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,208.40 : 352,700.92 = 85,429.20 : x
  2. Step 2: Convert to fraction form
    235,208.40/352,700.92 = 85,429.20/x
  3. Step 3: Cross multiply
    235,208.40x = 352,700.92 × 85,429.20
  4. Step 4: Simplify right side
    235,208.40x = 30,130,957,434.86
  5. Step 5: Solve for x
    x = 30,130,957,434.86/235,208.40
  6. Step 6: Final answer
    x = 128,103.24

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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.