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Finding the Fourth Proportional to 351,881.06, 527,814.20 and 85,643.06

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Solution

The fourth proportional to 351,881.06, 527,814.20 and 85,643.06 is: 128,462.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,881.06 : 527,814.20 = 85,643.06 : x
  2. Step 2: Convert to fraction form
    351,881.06/527,814.20 = 85,643.06/x
  3. Step 3: Cross multiply
    351,881.06x = 527,814.20 × 85,643.06
  4. Step 4: Simplify right side
    351,881.06x = 45,203,620,774.49
  5. Step 5: Solve for x
    x = 45,203,620,774.49/351,881.06
  6. Step 6: Final answer
    x = 128,462.79

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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.