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Finding the Fourth Proportional to 103,399.53, 142,745.55 and 69,585.81

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Solution

The fourth proportional to 103,399.53, 142,745.55 and 69,585.81 is: 96,064.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,399.53 : 142,745.55 = 69,585.81 : x
  2. Step 2: Convert to fraction form
    103,399.53/142,745.55 = 69,585.81/x
  3. Step 3: Cross multiply
    103,399.53x = 142,745.55 × 69,585.81
  4. Step 4: Simplify right side
    103,399.53x = 9,933,064,720.65
  5. Step 5: Solve for x
    x = 9,933,064,720.65/103,399.53
  6. Step 6: Final answer
    x = 96,064.89

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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.