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Finding the Fourth Proportional to 70,249.79, 105,448.95 and 68,663.30

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Solution

The fourth proportional to 70,249.79, 105,448.95 and 68,663.30 is: 103,067.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,249.79 : 105,448.95 = 68,663.30 : x
  2. Step 2: Convert to fraction form
    70,249.79/105,448.95 = 68,663.30/x
  3. Step 3: Cross multiply
    70,249.79x = 105,448.95 × 68,663.30
  4. Step 4: Simplify right side
    70,249.79x = 7,240,473,152.16
  5. Step 5: Solve for x
    x = 7,240,473,152.16/70,249.79
  6. Step 6: Final answer
    x = 103,067.54

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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.