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Finding the Fourth Proportional to 70,281.32, 105,422.08 and 28,728.32

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Solution

The fourth proportional to 70,281.32, 105,422.08 and 28,728.32 is: 43,092.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,281.32 : 105,422.08 = 28,728.32 : x
  2. Step 2: Convert to fraction form
    70,281.32/105,422.08 = 28,728.32/x
  3. Step 3: Cross multiply
    70,281.32x = 105,422.08 × 28,728.32
  4. Step 4: Simplify right side
    70,281.32x = 3,028,599,249.31
  5. Step 5: Solve for x
    x = 3,028,599,249.31/70,281.32
  6. Step 6: Final answer
    x = 43,092.52

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1.5x scale

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.