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Finding the Fourth Proportional to 156,418.36, 215,868.78 and 89,348.92

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Solution

The fourth proportional to 156,418.36, 215,868.78 and 89,348.92 is: 123,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,418.36 : 215,868.78 = 89,348.92 : x
  2. Step 2: Convert to fraction form
    156,418.36/215,868.78 = 89,348.92/x
  3. Step 3: Cross multiply
    156,418.36x = 215,868.78 × 89,348.92
  4. Step 4: Simplify right side
    156,418.36x = 19,287,642,354.72
  5. Step 5: Solve for x
    x = 19,287,642,354.72/156,418.36
  6. Step 6: Final answer
    x = 123,308.05

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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.