Home / 85,109.81-117,341.75-69,739.20

Finding the Fourth Proportional to 85,109.81, 117,341.75 and 69,739.20

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Solution

The fourth proportional to 85,109.81, 117,341.75 and 69,739.20 is: 96,150.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.81 : 117,341.75 = 69,739.20 : x
  2. Step 2: Convert to fraction form
    85,109.81/117,341.75 = 69,739.20/x
  3. Step 3: Cross multiply
    85,109.81x = 117,341.75 × 69,739.20
  4. Step 4: Simplify right side
    85,109.81x = 8,183,318,836.20
  5. Step 5: Solve for x
    x = 8,183,318,836.20/85,109.81
  6. Step 6: Final answer
    x = 96,150.13

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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.