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Finding the Fourth Proportional to 70,188.59, 105,124.26 and 49,221.74

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Solution

The fourth proportional to 70,188.59, 105,124.26 and 49,221.74 is: 73,721.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,188.59 : 105,124.26 = 49,221.74 : x
  2. Step 2: Convert to fraction form
    70,188.59/105,124.26 = 49,221.74/x
  3. Step 3: Cross multiply
    70,188.59x = 105,124.26 × 49,221.74
  4. Step 4: Simplify right side
    70,188.59x = 5,174,398,993.41
  5. Step 5: Solve for x
    x = 5,174,398,993.41/70,188.59
  6. Step 6: Final answer
    x = 73,721.37

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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.