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Finding the Fourth Proportional to 70,625.57, 105,952.94 and 20,707.29

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Solution

The fourth proportional to 70,625.57, 105,952.94 and 20,707.29 is: 31,065.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,625.57 : 105,952.94 = 20,707.29 : x
  2. Step 2: Convert to fraction form
    70,625.57/105,952.94 = 20,707.29/x
  3. Step 3: Cross multiply
    70,625.57x = 105,952.94 × 20,707.29
  4. Step 4: Simplify right side
    70,625.57x = 2,193,998,254.93
  5. Step 5: Solve for x
    x = 2,193,998,254.93/70,625.57
  6. Step 6: Final answer
    x = 31,065.21

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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.