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Finding the Fourth Proportional to 72,420.42, 108,660.63 and 39,101.33

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Solution

The fourth proportional to 72,420.42, 108,660.63 and 39,101.33 is: 58,668.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420.42 : 108,660.63 = 39,101.33 : x
  2. Step 2: Convert to fraction form
    72,420.42/108,660.63 = 39,101.33/x
  3. Step 3: Cross multiply
    72,420.42x = 108,660.63 × 39,101.33
  4. Step 4: Simplify right side
    72,420.42x = 4,248,774,608.33
  5. Step 5: Solve for x
    x = 4,248,774,608.33/72,420.42
  6. Step 6: Final answer
    x = 58,668.19

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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.