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Finding the Fourth Proportional to 103,863.51, 143,449.87 and 69,812.88

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Solution

The fourth proportional to 103,863.51, 143,449.87 and 69,812.88 is: 96,421.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,863.51 : 143,449.87 = 69,812.88 : x
  2. Step 2: Convert to fraction form
    103,863.51/143,449.87 = 69,812.88/x
  3. Step 3: Cross multiply
    103,863.51x = 143,449.87 × 69,812.88
  4. Step 4: Simplify right side
    103,863.51x = 10,014,647,847.86
  5. Step 5: Solve for x
    x = 10,014,647,847.86/103,863.51
  6. Step 6: Final answer
    x = 96,421.24

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1.5x scale

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.