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Finding the Fourth Proportional to 156,978.40, 235,456.80 and 50,360.80

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Solution

The fourth proportional to 156,978.40, 235,456.80 and 50,360.80 is: 75,537.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.40 : 235,456.80 = 50,360.80 : x
  2. Step 2: Convert to fraction form
    156,978.40/235,456.80 = 50,360.80/x
  3. Step 3: Cross multiply
    156,978.40x = 235,456.80 × 50,360.80
  4. Step 4: Simplify right side
    156,978.40x = 11,857,792,813.44
  5. Step 5: Solve for x
    x = 11,857,792,813.44/156,978.40
  6. Step 6: Final answer
    x = 75,537.74

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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.