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Finding the Fourth Proportional to 235,605.60, 325,128.32 and 128,172.88

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Solution

The fourth proportional to 235,605.60, 325,128.32 and 128,172.88 is: 176,874.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,605.60 : 325,128.32 = 128,172.88 : x
  2. Step 2: Convert to fraction form
    235,605.60/325,128.32 = 128,172.88/x
  3. Step 3: Cross multiply
    235,605.60x = 325,128.32 × 128,172.88
  4. Step 4: Simplify right side
    235,605.60x = 41,672,633,143.96
  5. Step 5: Solve for x
    x = 41,672,633,143.96/235,605.60
  6. Step 6: Final answer
    x = 176,874.54

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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.