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Finding the Fourth Proportional to 52,914.40, 79,355.76 and 21,314.32

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Solution

The fourth proportional to 52,914.40, 79,355.76 and 21,314.32 is: 31,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,914.40 : 79,355.76 = 21,314.32 : x
  2. Step 2: Convert to fraction form
    52,914.40/79,355.76 = 21,314.32/x
  3. Step 3: Cross multiply
    52,914.40x = 79,355.76 × 21,314.32
  4. Step 4: Simplify right side
    52,914.40x = 1,691,414,062.48
  5. Step 5: Solve for x
    x = 1,691,414,062.48/52,914.40
  6. Step 6: Final answer
    x = 31,965.10

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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.