Home / 100,856.20-151,284.30-85,109.80

Finding the Fourth Proportional to 100,856.20, 151,284.30 and 85,109.80

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Solution

The fourth proportional to 100,856.20, 151,284.30 and 85,109.80 is: 127,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,856.20 : 151,284.30 = 85,109.80 : x
  2. Step 2: Convert to fraction form
    100,856.20/151,284.30 = 85,109.80/x
  3. Step 3: Cross multiply
    100,856.20x = 151,284.30 × 85,109.80
  4. Step 4: Simplify right side
    100,856.20x = 12,875,776,516.14
  5. Step 5: Solve for x
    x = 12,875,776,516.14/100,856.20
  6. Step 6: Final answer
    x = 127,664.70

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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.