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Finding the Fourth Proportional to 70,219.64, 105,308.04 and 36,921.64

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Solution

The fourth proportional to 70,219.64, 105,308.04 and 36,921.64 is: 55,371.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,219.64 : 105,308.04 = 36,921.64 : x
  2. Step 2: Convert to fraction form
    70,219.64/105,308.04 = 36,921.64/x
  3. Step 3: Cross multiply
    70,219.64x = 105,308.04 × 36,921.64
  4. Step 4: Simplify right side
    70,219.64x = 3,888,145,541.99
  5. Step 5: Solve for x
    x = 3,888,145,541.99/70,219.64
  6. Step 6: Final answer
    x = 55,371.20

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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.