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Finding the Fourth Proportional to 70,216.51, 105,324.75 and 28,115.55

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Solution

The fourth proportional to 70,216.51, 105,324.75 and 28,115.55 is: 42,173.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,216.51 : 105,324.75 = 28,115.55 : x
  2. Step 2: Convert to fraction form
    70,216.51/105,324.75 = 28,115.55/x
  3. Step 3: Cross multiply
    70,216.51x = 105,324.75 × 28,115.55
  4. Step 4: Simplify right side
    70,216.51x = 2,961,263,134.28
  5. Step 5: Solve for x
    x = 2,961,263,134.28/70,216.51
  6. Step 6: Final answer
    x = 42,173.32

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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.