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Finding the Fourth Proportional to 351,876.70, 527,815.10 and 85,637.22

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Solution

The fourth proportional to 351,876.70, 527,815.10 and 85,637.22 is: 128,455.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,876.70 : 527,815.10 = 85,637.22 : x
  2. Step 2: Convert to fraction form
    351,876.70/527,815.10 = 85,637.22/x
  3. Step 3: Cross multiply
    351,876.70x = 527,815.10 × 85,637.22
  4. Step 4: Simplify right side
    351,876.70x = 45,200,617,838.02
  5. Step 5: Solve for x
    x = 45,200,617,838.02/351,876.70
  6. Step 6: Final answer
    x = 128,455.84

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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.