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Finding the Fourth Proportional to 163,221.80, 225,253.10 and 90,624.69

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Solution

The fourth proportional to 163,221.80, 225,253.10 and 90,624.69 is: 125,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,221.80 : 225,253.10 = 90,624.69 : x
  2. Step 2: Convert to fraction form
    163,221.80/225,253.10 = 90,624.69/x
  3. Step 3: Cross multiply
    163,221.80x = 225,253.10 × 90,624.69
  4. Step 4: Simplify right side
    163,221.80x = 20,413,492,585.60
  5. Step 5: Solve for x
    x = 20,413,492,585.60/163,221.80
  6. Step 6: Final answer
    x = 125,065.97

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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.