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Finding the Fourth Proportional to 72,520.47, 108,823.77 and 39,239.81

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Solution

The fourth proportional to 72,520.47, 108,823.77 and 39,239.81 is: 58,883.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,520.47 : 108,823.77 = 39,239.81 : x
  2. Step 2: Convert to fraction form
    72,520.47/108,823.77 = 39,239.81/x
  3. Step 3: Cross multiply
    72,520.47x = 108,823.77 × 39,239.81
  4. Step 4: Simplify right side
    72,520.47x = 4,270,223,514.16
  5. Step 5: Solve for x
    x = 4,270,223,514.16/72,520.47
  6. Step 6: Final answer
    x = 58,883.01

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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.