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Finding the Fourth Proportional to 70,211.72, 96,887.58 and 39,992.60

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Solution

The fourth proportional to 70,211.72, 96,887.58 and 39,992.60 is: 55,187.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,211.72 : 96,887.58 = 39,992.60 : x
  2. Step 2: Convert to fraction form
    70,211.72/96,887.58 = 39,992.60/x
  3. Step 3: Cross multiply
    70,211.72x = 96,887.58 × 39,992.60
  4. Step 4: Simplify right side
    70,211.72x = 3,874,786,231.91
  5. Step 5: Solve for x
    x = 3,874,786,231.91/70,211.72
  6. Step 6: Final answer
    x = 55,187.17

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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.