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Finding the Fourth Proportional to 70,572.93, 105,778.87 and 28,426.03

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Solution

The fourth proportional to 70,572.93, 105,778.87 and 28,426.03 is: 42,606.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,572.93 : 105,778.87 = 28,426.03 : x
  2. Step 2: Convert to fraction form
    70,572.93/105,778.87 = 28,426.03/x
  3. Step 3: Cross multiply
    70,572.93x = 105,778.87 × 28,426.03
  4. Step 4: Simplify right side
    70,572.93x = 3,006,873,331.99
  5. Step 5: Solve for x
    x = 3,006,873,331.99/70,572.93
  6. Step 6: Final answer
    x = 42,606.61

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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.