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Finding the Fourth Proportional to 351,661.02, 527,484.09 and 85,422.78

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Solution

The fourth proportional to 351,661.02, 527,484.09 and 85,422.78 is: 128,132.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,661.02 : 527,484.09 = 85,422.78 : x
  2. Step 2: Convert to fraction form
    351,661.02/527,484.09 = 85,422.78/x
  3. Step 3: Cross multiply
    351,661.02x = 527,484.09 × 85,422.78
  4. Step 4: Simplify right side
    351,661.02x = 45,059,157,373.57
  5. Step 5: Solve for x
    x = 45,059,157,373.57/351,661.02
  6. Step 6: Final answer
    x = 128,132.36

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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.