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Finding the Fourth Proportional to 156,980.30, 216,621.51 and 88,998.62

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Solution

The fourth proportional to 156,980.30, 216,621.51 and 88,998.62 is: 122,811.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,980.30 : 216,621.51 = 88,998.62 : x
  2. Step 2: Convert to fraction form
    156,980.30/216,621.51 = 88,998.62/x
  3. Step 3: Cross multiply
    156,980.30x = 216,621.51 × 88,998.62
  4. Step 4: Simplify right side
    156,980.30x = 19,279,015,452.32
  5. Step 5: Solve for x
    x = 19,279,015,452.32/156,980.30
  6. Step 6: Final answer
    x = 122,811.69

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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.