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Finding the Fourth Proportional to 51,991.40, 71,748.16 and 28,118.07

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Solution

The fourth proportional to 51,991.40, 71,748.16 and 28,118.07 is: 38,802.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,991.40 : 71,748.16 = 28,118.07 : x
  2. Step 2: Convert to fraction form
    51,991.40/71,748.16 = 28,118.07/x
  3. Step 3: Cross multiply
    51,991.40x = 71,748.16 × 28,118.07
  4. Step 4: Simplify right side
    51,991.40x = 2,017,419,714.96
  5. Step 5: Solve for x
    x = 2,017,419,714.96/51,991.40
  6. Step 6: Final answer
    x = 38,802.95

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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.