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Finding the Fourth Proportional to 126,639.88, 174,686.88 and 83,619.76

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Solution

The fourth proportional to 126,639.88, 174,686.88 and 83,619.76 is: 115,344.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,639.88 : 174,686.88 = 83,619.76 : x
  2. Step 2: Convert to fraction form
    126,639.88/174,686.88 = 83,619.76/x
  3. Step 3: Cross multiply
    126,639.88x = 174,686.88 × 83,619.76
  4. Step 4: Simplify right side
    126,639.88x = 14,607,274,980.75
  5. Step 5: Solve for x
    x = 14,607,274,980.75/126,639.88
  6. Step 6: Final answer
    x = 115,344.98

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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.