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Finding the Fourth Proportional to 71,338.81, 98,354.21 and 61,374.30

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Solution

The fourth proportional to 71,338.81, 98,354.21 and 61,374.30 is: 84,616.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,338.81 : 98,354.21 = 61,374.30 : x
  2. Step 2: Convert to fraction form
    71,338.81/98,354.21 = 61,374.30/x
  3. Step 3: Cross multiply
    71,338.81x = 98,354.21 × 61,374.30
  4. Step 4: Simplify right side
    71,338.81x = 6,036,420,790.80
  5. Step 5: Solve for x
    x = 6,036,420,790.80/71,338.81
  6. Step 6: Final answer
    x = 84,616.22

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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.