Home / 156,753.09-216,319.65-85,131.57

Finding the Fourth Proportional to 156,753.09, 216,319.65 and 85,131.57

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Solution

The fourth proportional to 156,753.09, 216,319.65 and 85,131.57 is: 117,481.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,753.09 : 216,319.65 = 85,131.57 : x
  2. Step 2: Convert to fraction form
    156,753.09/216,319.65 = 85,131.57/x
  3. Step 3: Cross multiply
    156,753.09x = 216,319.65 × 85,131.57
  4. Step 4: Simplify right side
    156,753.09x = 18,415,631,918.31
  5. Step 5: Solve for x
    x = 18,415,631,918.31/156,753.09
  6. Step 6: Final answer
    x = 117,481.78

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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.