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Finding the Fourth Proportional to 156,648.80, 216,174.61 and 85,028.20

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Solution

The fourth proportional to 156,648.80, 216,174.61 and 85,028.20 is: 117,338.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.80 : 216,174.61 = 85,028.20 : x
  2. Step 2: Convert to fraction form
    156,648.80/216,174.61 = 85,028.20/x
  3. Step 3: Cross multiply
    156,648.80x = 216,174.61 × 85,028.20
  4. Step 4: Simplify right side
    156,648.80x = 18,380,937,974.00
  5. Step 5: Solve for x
    x = 18,380,937,974.00/156,648.80
  6. Step 6: Final answer
    x = 117,338.52

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1.5x scale

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.