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Finding the Fourth Proportional to 163,399.85, 225,478.30 and 90,804.88

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Solution

The fourth proportional to 163,399.85, 225,478.30 and 90,804.88 is: 125,303.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,399.85 : 225,478.30 = 90,804.88 : x
  2. Step 2: Convert to fraction form
    163,399.85/225,478.30 = 90,804.88/x
  3. Step 3: Cross multiply
    163,399.85x = 225,478.30 × 90,804.88
  4. Step 4: Simplify right side
    163,399.85x = 20,474,529,974.10
  5. Step 5: Solve for x
    x = 20,474,529,974.10/163,399.85
  6. Step 6: Final answer
    x = 125,303.24

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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.