Home / 109,027.20-163,540.80-90,000.30

Finding the Fourth Proportional to 109,027.20, 163,540.80 and 90,000.30

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Solution

The fourth proportional to 109,027.20, 163,540.80 and 90,000.30 is: 135,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,027.20 : 163,540.80 = 90,000.30 : x
  2. Step 2: Convert to fraction form
    109,027.20/163,540.80 = 90,000.30/x
  3. Step 3: Cross multiply
    109,027.20x = 163,540.80 × 90,000.30
  4. Step 4: Simplify right side
    109,027.20x = 14,718,721,062.24
  5. Step 5: Solve for x
    x = 14,718,721,062.24/109,027.20
  6. Step 6: Final answer
    x = 135,000.45

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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.