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Finding the Fourth Proportional to 156,891.87, 216,521.10 and 88,908.57

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Solution

The fourth proportional to 156,891.87, 216,521.10 and 88,908.57 is: 122,699.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,891.87 : 216,521.10 = 88,908.57 : x
  2. Step 2: Convert to fraction form
    156,891.87/216,521.10 = 88,908.57/x
  3. Step 3: Cross multiply
    156,891.87x = 216,521.10 × 88,908.57
  4. Step 4: Simplify right side
    156,891.87x = 19,250,581,375.83
  5. Step 5: Solve for x
    x = 19,250,581,375.83/156,891.87
  6. Step 6: Final answer
    x = 122,699.67

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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.