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Finding the Fourth Proportional to 235,455.80, 353,340.72 and 85,696.07

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Solution

The fourth proportional to 235,455.80, 353,340.72 and 85,696.07 is: 128,601.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,455.80 : 353,340.72 = 85,696.07 : x
  2. Step 2: Convert to fraction form
    235,455.80/353,340.72 = 85,696.07/x
  3. Step 3: Cross multiply
    235,455.80x = 353,340.72 × 85,696.07
  4. Step 4: Simplify right side
    235,455.80x = 30,279,909,308.27
  5. Step 5: Solve for x
    x = 30,279,909,308.27/235,455.80
  6. Step 6: Final answer
    x = 128,601.25

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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.