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Finding the Fourth Proportional to 71,203.60, 106,891.80 and 39,638.80

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Solution

The fourth proportional to 71,203.60, 106,891.80 and 39,638.80 is: 59,506.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,203.60 : 106,891.80 = 39,638.80 : x
  2. Step 2: Convert to fraction form
    71,203.60/106,891.80 = 39,638.80/x
  3. Step 3: Cross multiply
    71,203.60x = 106,891.80 × 39,638.80
  4. Step 4: Simplify right side
    71,203.60x = 4,237,062,681.84
  5. Step 5: Solve for x
    x = 4,237,062,681.84/71,203.60
  6. Step 6: Final answer
    x = 59,506.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.