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Finding the Fourth Proportional to 156,974.34, 216,627.30 and 85,354.80

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Solution

The fourth proportional to 156,974.34, 216,627.30 and 85,354.80 is: 117,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,974.34 : 216,627.30 = 85,354.80 : x
  2. Step 2: Convert to fraction form
    156,974.34/216,627.30 = 85,354.80/x
  3. Step 3: Cross multiply
    156,974.34x = 216,627.30 × 85,354.80
  4. Step 4: Simplify right side
    156,974.34x = 18,490,179,866.04
  5. Step 5: Solve for x
    x = 18,490,179,866.04/156,974.34
  6. Step 6: Final answer
    x = 117,791.10

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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.