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Finding the Fourth Proportional to 70,928.34, 97,879.78 and 38,663.28

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Solution

The fourth proportional to 70,928.34, 97,879.78 and 38,663.28 is: 53,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,928.34 : 97,879.78 = 38,663.28 : x
  2. Step 2: Convert to fraction form
    70,928.34/97,879.78 = 38,663.28/x
  3. Step 3: Cross multiply
    70,928.34x = 97,879.78 × 38,663.28
  4. Step 4: Simplify right side
    70,928.34x = 3,784,353,340.48
  5. Step 5: Solve for x
    x = 3,784,353,340.48/70,928.34
  6. Step 6: Final answer
    x = 53,354.60

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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.