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Finding the Fourth Proportional to 99,991.14, 149,986.71 and 69,023.22

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Solution

The fourth proportional to 99,991.14, 149,986.71 and 69,023.22 is: 103,534.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,991.14 : 149,986.71 = 69,023.22 : x
  2. Step 2: Convert to fraction form
    99,991.14/149,986.71 = 69,023.22/x
  3. Step 3: Cross multiply
    99,991.14x = 149,986.71 × 69,023.22
  4. Step 4: Simplify right side
    99,991.14x = 10,352,565,681.41
  5. Step 5: Solve for x
    x = 10,352,565,681.41/99,991.14
  6. Step 6: Final answer
    x = 103,534.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.