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Finding the Fourth Proportional to 156,978.10, 235,467.15 and 125,874.10

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Solution

The fourth proportional to 156,978.10, 235,467.15 and 125,874.10 is: 188,811.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.10 : 235,467.15 = 125,874.10 : x
  2. Step 2: Convert to fraction form
    156,978.10/235,467.15 = 125,874.10/x
  3. Step 3: Cross multiply
    156,978.10x = 235,467.15 × 125,874.10
  4. Step 4: Simplify right side
    156,978.10x = 29,639,215,585.82
  5. Step 5: Solve for x
    x = 29,639,215,585.82/156,978.10
  6. Step 6: Final answer
    x = 188,811.15

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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.