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Finding the Fourth Proportional to 126,309.61, 174,308.69 and 69,720.97

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Solution

The fourth proportional to 126,309.61, 174,308.69 and 69,720.97 is: 96,215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,309.61 : 174,308.69 = 69,720.97 : x
  2. Step 2: Convert to fraction form
    126,309.61/174,308.69 = 69,720.97/x
  3. Step 3: Cross multiply
    126,309.61x = 174,308.69 × 69,720.97
  4. Step 4: Simplify right side
    126,309.61x = 12,152,970,946.23
  5. Step 5: Solve for x
    x = 12,152,970,946.23/126,309.61
  6. Step 6: Final answer
    x = 96,215.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.