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Finding the Fourth Proportional to 156,915.90, 235,114.65 and 133,587.90

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Solution

The fourth proportional to 156,915.90, 235,114.65 and 133,587.90 is: 200,161.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,915.90 : 235,114.65 = 133,587.90 : x
  2. Step 2: Convert to fraction form
    156,915.90/235,114.65 = 133,587.90/x
  3. Step 3: Cross multiply
    156,915.90x = 235,114.65 × 133,587.90
  4. Step 4: Simplify right side
    156,915.90x = 31,408,472,352.74
  5. Step 5: Solve for x
    x = 31,408,472,352.74/156,915.90
  6. Step 6: Final answer
    x = 200,161.18

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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.