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Finding the Fourth Proportional to 156,887.94, 216,505.38 and 85,267.96

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Solution

The fourth proportional to 156,887.94, 216,505.38 and 85,267.96 is: 117,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,887.94 : 216,505.38 = 85,267.96 : x
  2. Step 2: Convert to fraction form
    156,887.94/216,505.38 = 85,267.96/x
  3. Step 3: Cross multiply
    156,887.94x = 216,505.38 × 85,267.96
  4. Step 4: Simplify right side
    156,887.94x = 18,460,972,081.62
  5. Step 5: Solve for x
    x = 18,460,972,081.62/156,887.94
  6. Step 6: Final answer
    x = 117,669.80

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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.