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Finding the Fourth Proportional to 156,502.92, 215,978.91 and 88,518.56

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Solution

The fourth proportional to 156,502.92, 215,978.91 and 88,518.56 is: 122,158.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,502.92 : 215,978.91 = 88,518.56 : x
  2. Step 2: Convert to fraction form
    156,502.92/215,978.91 = 88,518.56/x
  3. Step 3: Cross multiply
    156,502.92x = 215,978.91 × 88,518.56
  4. Step 4: Simplify right side
    156,502.92x = 19,118,141,023.68
  5. Step 5: Solve for x
    x = 19,118,141,023.68/156,502.92
  6. Step 6: Final answer
    x = 122,158.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.