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Finding the Fourth Proportional to 351,956.17, 527,923.92 and 85,712.82

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Solution

The fourth proportional to 351,956.17, 527,923.92 and 85,712.82 is: 128,566.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,956.17 : 527,923.92 = 85,712.82 : x
  2. Step 2: Convert to fraction form
    351,956.17/527,923.92 = 85,712.82/x
  3. Step 3: Cross multiply
    351,956.17x = 527,923.92 × 85,712.82
  4. Step 4: Simplify right side
    351,956.17x = 45,249,847,928.65
  5. Step 5: Solve for x
    x = 45,249,847,928.65/351,956.17
  6. Step 6: Final answer
    x = 128,566.71

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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.