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Finding the Fourth Proportional to 163,906.20, 245,859.30 and 90,178.20

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Solution

The fourth proportional to 163,906.20, 245,859.30 and 90,178.20 is: 135,267.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,906.20 : 245,859.30 = 90,178.20 : x
  2. Step 2: Convert to fraction form
    163,906.20/245,859.30 = 90,178.20/x
  3. Step 3: Cross multiply
    163,906.20x = 245,859.30 × 90,178.20
  4. Step 4: Simplify right side
    163,906.20x = 22,171,149,127.26
  5. Step 5: Solve for x
    x = 22,171,149,127.26/163,906.20
  6. Step 6: Final answer
    x = 135,267.30

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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.