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Finding the Fourth Proportional to 156,978.80, 216,619.44 and 88,997.12

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Solution

The fourth proportional to 156,978.80, 216,619.44 and 88,997.12 is: 122,809.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.80 : 216,619.44 = 88,997.12 : x
  2. Step 2: Convert to fraction form
    156,978.80/216,619.44 = 88,997.12/x
  3. Step 3: Cross multiply
    156,978.80x = 216,619.44 × 88,997.12
  4. Step 4: Simplify right side
    156,978.80x = 19,278,506,296.01
  5. Step 5: Solve for x
    x = 19,278,506,296.01/156,978.80
  6. Step 6: Final answer
    x = 122,809.62

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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.