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Finding the Fourth Proportional to 120,003.20, 180,004.80 and 109,116.80

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Solution

The fourth proportional to 120,003.20, 180,004.80 and 109,116.80 is: 163,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,003.20 : 180,004.80 = 109,116.80 : x
  2. Step 2: Convert to fraction form
    120,003.20/180,004.80 = 109,116.80/x
  3. Step 3: Cross multiply
    120,003.20x = 180,004.80 × 109,116.80
  4. Step 4: Simplify right side
    120,003.20x = 19,641,547,760.64
  5. Step 5: Solve for x
    x = 19,641,547,760.64/120,003.20
  6. Step 6: Final answer
    x = 163,675.20

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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.