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Finding the Fourth Proportional to 51,412.70, 70,949.03 and 28,751.43

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Solution

The fourth proportional to 51,412.70, 70,949.03 and 28,751.43 is: 39,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,412.70 : 70,949.03 = 28,751.43 : x
  2. Step 2: Convert to fraction form
    51,412.70/70,949.03 = 28,751.43/x
  3. Step 3: Cross multiply
    51,412.70x = 70,949.03 × 28,751.43
  4. Step 4: Simplify right side
    51,412.70x = 2,039,885,925.86
  5. Step 5: Solve for x
    x = 2,039,885,925.86/51,412.70
  6. Step 6: Final answer
    x = 39,676.70

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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.