Home / 109,020.30-163,530.45-85,400.70

Finding the Fourth Proportional to 109,020.30, 163,530.45 and 85,400.70

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Solution

The fourth proportional to 109,020.30, 163,530.45 and 85,400.70 is: 128,101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,020.30 : 163,530.45 = 85,400.70 : x
  2. Step 2: Convert to fraction form
    109,020.30/163,530.45 = 85,400.70/x
  3. Step 3: Cross multiply
    109,020.30x = 163,530.45 × 85,400.70
  4. Step 4: Simplify right side
    109,020.30x = 13,965,614,901.32
  5. Step 5: Solve for x
    x = 13,965,614,901.32/109,020.30
  6. Step 6: Final answer
    x = 128,101.05

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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.