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Finding the Fourth Proportional to 235,455.66, 353,213.87 and 85,672.89

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Solution

The fourth proportional to 235,455.66, 353,213.87 and 85,672.89 is: 128,520.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,455.66 : 353,213.87 = 85,672.89 : x
  2. Step 2: Convert to fraction form
    235,455.66/353,213.87 = 85,672.89/x
  3. Step 3: Cross multiply
    235,455.66x = 353,213.87 × 85,672.89
  4. Step 4: Simplify right side
    235,455.66x = 30,260,852,602.62
  5. Step 5: Solve for x
    x = 30,260,852,602.62/235,455.66
  6. Step 6: Final answer
    x = 128,520.39

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1.5x scale

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.