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Finding the Fourth Proportional to 72,670.92, 108,904.87 and 35,221.05

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Solution

The fourth proportional to 72,670.92, 108,904.87 and 35,221.05 is: 52,782.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,670.92 : 108,904.87 = 35,221.05 : x
  2. Step 2: Convert to fraction form
    72,670.92/108,904.87 = 35,221.05/x
  3. Step 3: Cross multiply
    72,670.92x = 108,904.87 × 35,221.05
  4. Step 4: Simplify right side
    72,670.92x = 3,835,743,871.51
  5. Step 5: Solve for x
    x = 3,835,743,871.51/72,670.92
  6. Step 6: Final answer
    x = 52,782.38

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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.