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Finding the Fourth Proportional to 70,989.82, 97,766.64 and 69,439.79

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Solution

The fourth proportional to 70,989.82, 97,766.64 and 69,439.79 is: 95,631.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,989.82 : 97,766.64 = 69,439.79 : x
  2. Step 2: Convert to fraction form
    70,989.82/97,766.64 = 69,439.79/x
  3. Step 3: Cross multiply
    70,989.82x = 97,766.64 × 69,439.79
  4. Step 4: Simplify right side
    70,989.82x = 6,788,895,195.02
  5. Step 5: Solve for x
    x = 6,788,895,195.02/70,989.82
  6. Step 6: Final answer
    x = 95,631.96

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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.