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Finding the Fourth Proportional to 70,219.70, 105,308.13 and 36,921.70

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Solution

The fourth proportional to 70,219.70, 105,308.13 and 36,921.70 is: 55,371.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,219.70 : 105,308.13 = 36,921.70 : x
  2. Step 2: Convert to fraction form
    70,219.70/105,308.13 = 36,921.70/x
  3. Step 3: Cross multiply
    70,219.70x = 105,308.13 × 36,921.70
  4. Step 4: Simplify right side
    70,219.70x = 3,888,155,585.15
  5. Step 5: Solve for x
    x = 3,888,155,585.15/70,219.70
  6. Step 6: Final answer
    x = 55,371.29

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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.