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Finding the Fourth Proportional to 163,620.80, 245,431.20 and 135,972.80

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Solution

The fourth proportional to 163,620.80, 245,431.20 and 135,972.80 is: 203,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,620.80 : 245,431.20 = 135,972.80 : x
  2. Step 2: Convert to fraction form
    163,620.80/245,431.20 = 135,972.80/x
  3. Step 3: Cross multiply
    163,620.80x = 245,431.20 × 135,972.80
  4. Step 4: Simplify right side
    163,620.80x = 33,371,967,471.36
  5. Step 5: Solve for x
    x = 33,371,967,471.36/163,620.80
  6. Step 6: Final answer
    x = 203,959.20

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1.5x scale

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.