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Finding the Fourth Proportional to 71,368.98, 98,485.92 and 39,103.44

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Solution

The fourth proportional to 71,368.98, 98,485.92 and 39,103.44 is: 53,960.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,368.98 : 98,485.92 = 39,103.44 : x
  2. Step 2: Convert to fraction form
    71,368.98/98,485.92 = 39,103.44/x
  3. Step 3: Cross multiply
    71,368.98x = 98,485.92 × 39,103.44
  4. Step 4: Simplify right side
    71,368.98x = 3,851,138,263.56
  5. Step 5: Solve for x
    x = 3,851,138,263.56/71,368.98
  6. Step 6: Final answer
    x = 53,960.95

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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.