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Finding the Fourth Proportional to 307,531.50, 461,375.04 and 85,915.50

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Solution

The fourth proportional to 307,531.50, 461,375.04 and 85,915.50 is: 128,894.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,531.50 : 461,375.04 = 85,915.50 : x
  2. Step 2: Convert to fraction form
    307,531.50/461,375.04 = 85,915.50/x
  3. Step 3: Cross multiply
    307,531.50x = 461,375.04 × 85,915.50
  4. Step 4: Simplify right side
    307,531.50x = 39,639,267,249.12
  5. Step 5: Solve for x
    x = 39,639,267,249.12/307,531.50
  6. Step 6: Final answer
    x = 128,894.98

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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.