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Finding the Fourth Proportional to 126,640.88, 174,688.26 and 83,620.76

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Solution

The fourth proportional to 126,640.88, 174,688.26 and 83,620.76 is: 115,346.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,640.88 : 174,688.26 = 83,620.76 : x
  2. Step 2: Convert to fraction form
    126,640.88/174,688.26 = 83,620.76/x
  3. Step 3: Cross multiply
    126,640.88x = 174,688.26 × 83,620.76
  4. Step 4: Simplify right side
    126,640.88x = 14,607,565,064.28
  5. Step 5: Solve for x
    x = 14,607,565,064.28/126,640.88
  6. Step 6: Final answer
    x = 115,346.36

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1.5x scale

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.