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Finding the Fourth Proportional to 235,345.76, 353,168.76 and 85,571.70

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Solution

The fourth proportional to 235,345.76, 353,168.76 and 85,571.70 is: 128,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,345.76 : 353,168.76 = 85,571.70 : x
  2. Step 2: Convert to fraction form
    235,345.76/353,168.76 = 85,571.70/x
  3. Step 3: Cross multiply
    235,345.76x = 353,168.76 × 85,571.70
  4. Step 4: Simplify right side
    235,345.76x = 30,221,251,180.09
  5. Step 5: Solve for x
    x = 30,221,251,180.09/235,345.76
  6. Step 6: Final answer
    x = 128,412.13

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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.