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Finding the Fourth Proportional to 156,556, 216,047.28 and 89,489.44

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Solution

The fourth proportional to 156,556, 216,047.28 and 89,489.44 is: 123,495.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,556 : 216,047.28 = 89,489.44 : x
  2. Step 2: Convert to fraction form
    156,556/216,047.28 = 89,489.44/x
  3. Step 3: Cross multiply
    156,556x = 216,047.28 × 89,489.44
  4. Step 4: Simplify right side
    156,556x = 19,333,950,100.72
  5. Step 5: Solve for x
    x = 19,333,950,100.72/156,556
  6. Step 6: Final answer
    x = 123,495.43

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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.