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Finding the Fourth Proportional to 70,161.89, 105,293.25 and 28,017.79

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Solution

The fourth proportional to 70,161.89, 105,293.25 and 28,017.79 is: 42,046.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,161.89 : 105,293.25 = 28,017.79 : x
  2. Step 2: Convert to fraction form
    70,161.89/105,293.25 = 28,017.79/x
  3. Step 3: Cross multiply
    70,161.89x = 105,293.25 × 28,017.79
  4. Step 4: Simplify right side
    70,161.89x = 2,950,083,903.68
  5. Step 5: Solve for x
    x = 2,950,083,903.68/70,161.89
  6. Step 6: Final answer
    x = 42,046.82

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1.5x scale

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.