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Finding the Fourth Proportional to 156,502.79, 215,978.74 and 88,518.44

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Solution

The fourth proportional to 156,502.79, 215,978.74 and 88,518.44 is: 122,158.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,502.79 : 215,978.74 = 88,518.44 : x
  2. Step 2: Convert to fraction form
    156,502.79/215,978.74 = 88,518.44/x
  3. Step 3: Cross multiply
    156,502.79x = 215,978.74 × 88,518.44
  4. Step 4: Simplify right side
    156,502.79x = 19,118,101,137.97
  5. Step 5: Solve for x
    x = 19,118,101,137.97/156,502.79
  6. Step 6: Final answer
    x = 122,158.21

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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.