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Finding the Fourth Proportional to 163,491.60, 225,625.08 and 91,871.40

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Solution

The fourth proportional to 163,491.60, 225,625.08 and 91,871.40 is: 126,786.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,491.60 : 225,625.08 = 91,871.40 : x
  2. Step 2: Convert to fraction form
    163,491.60/225,625.08 = 91,871.40/x
  3. Step 3: Cross multiply
    163,491.60x = 225,625.08 × 91,871.40
  4. Step 4: Simplify right side
    163,491.60x = 20,728,491,974.71
  5. Step 5: Solve for x
    x = 20,728,491,974.71/163,491.60
  6. Step 6: Final answer
    x = 126,786.28

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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.