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Finding the Fourth Proportional to 51,169.64, 70,619.27 and 28,512.32

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Solution

The fourth proportional to 51,169.64, 70,619.27 and 28,512.32 is: 39,349.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,169.64 : 70,619.27 = 28,512.32 : x
  2. Step 2: Convert to fraction form
    51,169.64/70,619.27 = 28,512.32/x
  3. Step 3: Cross multiply
    51,169.64x = 70,619.27 × 28,512.32
  4. Step 4: Simplify right side
    51,169.64x = 2,013,518,728.75
  5. Step 5: Solve for x
    x = 2,013,518,728.75/51,169.64
  6. Step 6: Final answer
    x = 39,349.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.