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Finding the Fourth Proportional to 156,376.48, 215,800.32 and 91,889.20

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Solution

The fourth proportional to 156,376.48, 215,800.32 and 91,889.20 is: 126,807.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,376.48 : 215,800.32 = 91,889.20 : x
  2. Step 2: Convert to fraction form
    156,376.48/215,800.32 = 91,889.20/x
  3. Step 3: Cross multiply
    156,376.48x = 215,800.32 × 91,889.20
  4. Step 4: Simplify right side
    156,376.48x = 19,829,718,764.54
  5. Step 5: Solve for x
    x = 19,829,718,764.54/156,376.48
  6. Step 6: Final answer
    x = 126,807.55

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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.