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Finding the Fourth Proportional to 70,280.31, 105,420.57 and 28,727.31

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Solution

The fourth proportional to 70,280.31, 105,420.57 and 28,727.31 is: 43,091.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,280.31 : 105,420.57 = 28,727.31 : x
  2. Step 2: Convert to fraction form
    70,280.31/105,420.57 = 28,727.31/x
  3. Step 3: Cross multiply
    70,280.31x = 105,420.57 × 28,727.31
  4. Step 4: Simplify right side
    70,280.31x = 3,028,449,394.77
  5. Step 5: Solve for x
    x = 3,028,449,394.77/70,280.31
  6. Step 6: Final answer
    x = 43,091.01

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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.