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Finding the Fourth Proportional to 70,771.88, 97,667.52 and 38,943.20

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Solution

The fourth proportional to 70,771.88, 97,667.52 and 38,943.20 is: 53,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,771.88 : 97,667.52 = 38,943.20 : x
  2. Step 2: Convert to fraction form
    70,771.88/97,667.52 = 38,943.20/x
  3. Step 3: Cross multiply
    70,771.88x = 97,667.52 × 38,943.20
  4. Step 4: Simplify right side
    70,771.88x = 3,803,485,764.86
  5. Step 5: Solve for x
    x = 3,803,485,764.86/70,771.88
  6. Step 6: Final answer
    x = 53,742.90

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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.