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Finding the Fourth Proportional to 235,039.13, 352,698.79 and 85,291.10

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Solution

The fourth proportional to 235,039.13, 352,698.79 and 85,291.10 is: 127,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,039.13 : 352,698.79 = 85,291.10 : x
  2. Step 2: Convert to fraction form
    235,039.13/352,698.79 = 85,291.10/x
  3. Step 3: Cross multiply
    235,039.13x = 352,698.79 × 85,291.10
  4. Step 4: Simplify right side
    235,039.13x = 30,082,068,436.29
  5. Step 5: Solve for x
    x = 30,082,068,436.29/235,039.13
  6. Step 6: Final answer
    x = 127,987.49

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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.