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Finding the Fourth Proportional to 351,810.75, 527,711.73 and 85,571.45

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Solution

The fourth proportional to 351,810.75, 527,711.73 and 85,571.45 is: 128,356.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,810.75 : 527,711.73 = 85,571.45 : x
  2. Step 2: Convert to fraction form
    351,810.75/527,711.73 = 85,571.45/x
  3. Step 3: Cross multiply
    351,810.75x = 527,711.73 × 85,571.45
  4. Step 4: Simplify right side
    351,810.75x = 45,157,057,918.11
  5. Step 5: Solve for x
    x = 45,157,057,918.11/351,810.75
  6. Step 6: Final answer
    x = 128,356.11

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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.