Home / 121,321.60-182,176.80-91,772.80

Finding the Fourth Proportional to 121,321.60, 182,176.80 and 91,772.80

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Solution

The fourth proportional to 121,321.60, 182,176.80 and 91,772.80 is: 137,806.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,321.60 : 182,176.80 = 91,772.80 : x
  2. Step 2: Convert to fraction form
    121,321.60/182,176.80 = 91,772.80/x
  3. Step 3: Cross multiply
    121,321.60x = 182,176.80 × 91,772.80
  4. Step 4: Simplify right side
    121,321.60x = 16,718,875,031.04
  5. Step 5: Solve for x
    x = 16,718,875,031.04/121,321.60
  6. Step 6: Final answer
    x = 137,806.25

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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.