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Finding the Fourth Proportional to 235,781.53, 325,378.52 and 128,352.35

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Solution

The fourth proportional to 235,781.53, 325,378.52 and 128,352.35 is: 177,126.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,781.53 : 325,378.52 = 128,352.35 : x
  2. Step 2: Convert to fraction form
    235,781.53/325,378.52 = 128,352.35/x
  3. Step 3: Cross multiply
    235,781.53x = 325,378.52 × 128,352.35
  4. Step 4: Simplify right side
    235,781.53x = 41,763,096,504.27
  5. Step 5: Solve for x
    x = 41,763,096,504.27/235,781.53
  6. Step 6: Final answer
    x = 177,126.24

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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.