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Finding the Fourth Proportional to 71,041.60, 106,821.60 and 59,636.80

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Solution

The fourth proportional to 71,041.60, 106,821.60 and 59,636.80 is: 89,672.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,041.60 : 106,821.60 = 59,636.80 : x
  2. Step 2: Convert to fraction form
    71,041.60/106,821.60 = 59,636.80/x
  3. Step 3: Cross multiply
    71,041.60x = 106,821.60 × 59,636.80
  4. Step 4: Simplify right side
    71,041.60x = 6,370,498,394.88
  5. Step 5: Solve for x
    x = 6,370,498,394.88/71,041.60
  6. Step 6: Final answer
    x = 89,672.79

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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.