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Finding the Fourth Proportional to 70,125.44, 105,229.80 and 28,025.42

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Solution

The fourth proportional to 70,125.44, 105,229.80 and 28,025.42 is: 42,054.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,125.44 : 105,229.80 = 28,025.42 : x
  2. Step 2: Convert to fraction form
    70,125.44/105,229.80 = 28,025.42/x
  3. Step 3: Cross multiply
    70,125.44x = 105,229.80 × 28,025.42
  4. Step 4: Simplify right side
    70,125.44x = 2,949,109,341.52
  5. Step 5: Solve for x
    x = 2,949,109,341.52/70,125.44
  6. Step 6: Final answer
    x = 42,054.77

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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.