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Finding the Fourth Proportional to 70,957.75, 106,436.63 and 28,860.73

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Solution

The fourth proportional to 70,957.75, 106,436.63 and 28,860.73 is: 43,291.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.75 : 106,436.63 = 28,860.73 : x
  2. Step 2: Convert to fraction form
    70,957.75/106,436.63 = 28,860.73/x
  3. Step 3: Cross multiply
    70,957.75x = 106,436.63 × 28,860.73
  4. Step 4: Simplify right side
    70,957.75x = 3,071,838,840.54
  5. Step 5: Solve for x
    x = 3,071,838,840.54/70,957.75
  6. Step 6: Final answer
    x = 43,291.10

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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.