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Finding the Fourth Proportional to 235,781.34, 325,378.32 and 128,352.21

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Solution

The fourth proportional to 235,781.34, 325,378.32 and 128,352.21 is: 177,126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,781.34 : 325,378.32 = 128,352.21 : x
  2. Step 2: Convert to fraction form
    235,781.34/325,378.32 = 128,352.21/x
  3. Step 3: Cross multiply
    235,781.34x = 325,378.32 × 128,352.21
  4. Step 4: Simplify right side
    235,781.34x = 41,763,026,458.09
  5. Step 5: Solve for x
    x = 41,763,026,458.09/235,781.34
  6. Step 6: Final answer
    x = 177,126.09

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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.