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Finding the Fourth Proportional to 163,612.80, 225,928.80 and 103,291.20

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Solution

The fourth proportional to 163,612.80, 225,928.80 and 103,291.20 is: 142,632.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,612.80 : 225,928.80 = 103,291.20 : x
  2. Step 2: Convert to fraction form
    163,612.80/225,928.80 = 103,291.20/x
  3. Step 3: Cross multiply
    163,612.80x = 225,928.80 × 103,291.20
  4. Step 4: Simplify right side
    163,612.80x = 23,336,456,866.56
  5. Step 5: Solve for x
    x = 23,336,456,866.56/163,612.80
  6. Step 6: Final answer
    x = 142,632.22

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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.