Home / 156,629.85-216,149.40-85,009.87

Finding the Fourth Proportional to 156,629.85, 216,149.40 and 85,009.87

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Solution

The fourth proportional to 156,629.85, 216,149.40 and 85,009.87 is: 117,313.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,629.85 : 216,149.40 = 85,009.87 : x
  2. Step 2: Convert to fraction form
    156,629.85/216,149.40 = 85,009.87/x
  3. Step 3: Cross multiply
    156,629.85x = 216,149.40 × 85,009.87
  4. Step 4: Simplify right side
    156,629.85x = 18,374,832,394.58
  5. Step 5: Solve for x
    x = 18,374,832,394.58/156,629.85
  6. Step 6: Final answer
    x = 117,313.73

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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.