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Finding the Fourth Proportional to 235,380.12, 353,063.65 and 85,623.17

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Solution

The fourth proportional to 235,380.12, 353,063.65 and 85,623.17 is: 128,432.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,380.12 : 353,063.65 = 85,623.17 : x
  2. Step 2: Convert to fraction form
    235,380.12/353,063.65 = 85,623.17/x
  3. Step 3: Cross multiply
    235,380.12x = 353,063.65 × 85,623.17
  4. Step 4: Simplify right side
    235,380.12x = 30,230,428,924.77
  5. Step 5: Solve for x
    x = 30,230,428,924.77/235,380.12
  6. Step 6: Final answer
    x = 128,432.38

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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.