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Finding the Fourth Proportional to 71,220.80, 106,690.40 and 62,465.60

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Solution

The fourth proportional to 71,220.80, 106,690.40 and 62,465.60 is: 93,574.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,220.80 : 106,690.40 = 62,465.60 : x
  2. Step 2: Convert to fraction form
    71,220.80/106,690.40 = 62,465.60/x
  3. Step 3: Cross multiply
    71,220.80x = 106,690.40 × 62,465.60
  4. Step 4: Simplify right side
    71,220.80x = 6,664,479,850.24
  5. Step 5: Solve for x
    x = 6,664,479,850.24/71,220.80
  6. Step 6: Final answer
    x = 93,574.91

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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.