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Finding the Fourth Proportional to 70,162.64, 96,832.72 and 39,955.20

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Solution

The fourth proportional to 70,162.64, 96,832.72 and 39,955.20 is: 55,142.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,162.64 : 96,832.72 = 39,955.20 : x
  2. Step 2: Convert to fraction form
    70,162.64/96,832.72 = 39,955.20/x
  3. Step 3: Cross multiply
    70,162.64x = 96,832.72 × 39,955.20
  4. Step 4: Simplify right side
    70,162.64x = 3,868,970,694.14
  5. Step 5: Solve for x
    x = 3,868,970,694.14/70,162.64
  6. Step 6: Final answer
    x = 55,142.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.