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Finding the Fourth Proportional to 156,879.05, 216,494.78 and 85,259.08

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Solution

The fourth proportional to 156,879.05, 216,494.78 and 85,259.08 is: 117,658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,879.05 : 216,494.78 = 85,259.08 : x
  2. Step 2: Convert to fraction form
    156,879.05/216,494.78 = 85,259.08/x
  3. Step 3: Cross multiply
    156,879.05x = 216,494.78 × 85,259.08
  4. Step 4: Simplify right side
    156,879.05x = 18,458,145,611.93
  5. Step 5: Solve for x
    x = 18,458,145,611.93/156,879.05
  6. Step 6: Final answer
    x = 117,658.45

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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.