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Finding the Fourth Proportional to 156,987.98, 235,490.15 and 51,815.15

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Solution

The fourth proportional to 156,987.98, 235,490.15 and 51,815.15 is: 77,725.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.98 : 235,490.15 = 51,815.15 : x
  2. Step 2: Convert to fraction form
    156,987.98/235,490.15 = 51,815.15/x
  3. Step 3: Cross multiply
    156,987.98x = 235,490.15 × 51,815.15
  4. Step 4: Simplify right side
    156,987.98x = 12,201,957,445.77
  5. Step 5: Solve for x
    x = 12,201,957,445.77/156,987.98
  6. Step 6: Final answer
    x = 77,725.42

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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.