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Finding the Fourth Proportional to 163,260.80, 225,322.64 and 90,680

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Solution

The fourth proportional to 163,260.80, 225,322.64 and 90,680 is: 125,151.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,260.80 : 225,322.64 = 90,680 : x
  2. Step 2: Convert to fraction form
    163,260.80/225,322.64 = 90,680/x
  3. Step 3: Cross multiply
    163,260.80x = 225,322.64 × 90,680
  4. Step 4: Simplify right side
    163,260.80x = 20,432,256,995.20
  5. Step 5: Solve for x
    x = 20,432,256,995.20/163,260.80
  6. Step 6: Final answer
    x = 125,151.03

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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.