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Finding the Fourth Proportional to 156,989.02, 216,640.11 and 89,012.20

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Solution

The fourth proportional to 156,989.02, 216,640.11 and 89,012.20 is: 122,834.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.02 : 216,640.11 = 89,012.20 : x
  2. Step 2: Convert to fraction form
    156,989.02/216,640.11 = 89,012.20/x
  3. Step 3: Cross multiply
    156,989.02x = 216,640.11 × 89,012.20
  4. Step 4: Simplify right side
    156,989.02x = 19,283,612,799.34
  5. Step 5: Solve for x
    x = 19,283,612,799.34/156,989.02
  6. Step 6: Final answer
    x = 122,834.15

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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.