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Finding the Fourth Proportional to 156,879.09, 216,494.82 and 85,259.11

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Solution

The fourth proportional to 156,879.09, 216,494.82 and 85,259.11 is: 117,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,879.09 : 216,494.82 = 85,259.11 : x
  2. Step 2: Convert to fraction form
    156,879.09/216,494.82 = 85,259.11/x
  3. Step 3: Cross multiply
    156,879.09x = 216,494.82 × 85,259.11
  4. Step 4: Simplify right side
    156,879.09x = 18,458,155,672.81
  5. Step 5: Solve for x
    x = 18,458,155,672.81/156,879.09
  6. Step 6: Final answer
    x = 117,658.48

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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.