Home / 85,399.12-117,854.76-74,770.48

Finding the Fourth Proportional to 85,399.12, 117,854.76 and 74,770.48

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Solution

The fourth proportional to 85,399.12, 117,854.76 and 74,770.48 is: 103,186.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,399.12 : 117,854.76 = 74,770.48 : x
  2. Step 2: Convert to fraction form
    85,399.12/117,854.76 = 74,770.48/x
  3. Step 3: Cross multiply
    85,399.12x = 117,854.76 × 74,770.48
  4. Step 4: Simplify right side
    85,399.12x = 8,812,056,975.48
  5. Step 5: Solve for x
    x = 8,812,056,975.48/85,399.12
  6. Step 6: Final answer
    x = 103,186.74

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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.