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Finding the Fourth Proportional to 70,806.48, 97,712.28 and 38,974.56

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Solution

The fourth proportional to 70,806.48, 97,712.28 and 38,974.56 is: 53,784.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,806.48 : 97,712.28 = 38,974.56 : x
  2. Step 2: Convert to fraction form
    70,806.48/97,712.28 = 38,974.56/x
  3. Step 3: Cross multiply
    70,806.48x = 97,712.28 × 38,974.56
  4. Step 4: Simplify right side
    70,806.48x = 3,808,293,119.60
  5. Step 5: Solve for x
    x = 3,808,293,119.60/70,806.48
  6. Step 6: Final answer
    x = 53,784.53

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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.