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Finding the Fourth Proportional to 109,297.20, 163,945.80 and 99,620.40

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Solution

The fourth proportional to 109,297.20, 163,945.80 and 99,620.40 is: 149,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,297.20 : 163,945.80 = 99,620.40 : x
  2. Step 2: Convert to fraction form
    109,297.20/163,945.80 = 99,620.40/x
  3. Step 3: Cross multiply
    109,297.20x = 163,945.80 × 99,620.40
  4. Step 4: Simplify right side
    109,297.20x = 16,332,346,174.32
  5. Step 5: Solve for x
    x = 16,332,346,174.32/109,297.20
  6. Step 6: Final answer
    x = 149,430.60

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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.