Home / 156,619.79-216,135.49-84,999.86

Finding the Fourth Proportional to 156,619.79, 216,135.49 and 84,999.86

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Solution

The fourth proportional to 156,619.79, 216,135.49 and 84,999.86 is: 117,299.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,619.79 : 216,135.49 = 84,999.86 : x
  2. Step 2: Convert to fraction form
    156,619.79/216,135.49 = 84,999.86/x
  3. Step 3: Cross multiply
    156,619.79x = 216,135.49 × 84,999.86
  4. Step 4: Simplify right side
    156,619.79x = 18,371,486,718.87
  5. Step 5: Solve for x
    x = 18,371,486,718.87/156,619.79
  6. Step 6: Final answer
    x = 117,299.90

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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.