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Finding the Fourth Proportional to 70,813.08, 97,721.22 and 38,981.28

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Solution

The fourth proportional to 70,813.08, 97,721.22 and 38,981.28 is: 53,793.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,813.08 : 97,721.22 = 38,981.28 : x
  2. Step 2: Convert to fraction form
    70,813.08/97,721.22 = 38,981.28/x
  3. Step 3: Cross multiply
    70,813.08x = 97,721.22 × 38,981.28
  4. Step 4: Simplify right side
    70,813.08x = 3,809,298,238.76
  5. Step 5: Solve for x
    x = 3,809,298,238.76/70,813.08
  6. Step 6: Final answer
    x = 53,793.71

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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.