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Finding the Fourth Proportional to 72,767.08, 109,020.77 and 39,465.91

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Solution

The fourth proportional to 72,767.08, 109,020.77 and 39,465.91 is: 59,128.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,767.08 : 109,020.77 = 39,465.91 : x
  2. Step 2: Convert to fraction form
    72,767.08/109,020.77 = 39,465.91/x
  3. Step 3: Cross multiply
    72,767.08x = 109,020.77 × 39,465.91
  4. Step 4: Simplify right side
    72,767.08x = 4,302,603,677.27
  5. Step 5: Solve for x
    x = 4,302,603,677.27/72,767.08
  6. Step 6: Final answer
    x = 59,128.43

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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.