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Finding the Fourth Proportional to 77,274.40, 115,911.60 and 21,870.88

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Solution

The fourth proportional to 77,274.40, 115,911.60 and 21,870.88 is: 32,806.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,274.40 : 115,911.60 = 21,870.88 : x
  2. Step 2: Convert to fraction form
    77,274.40/115,911.60 = 21,870.88/x
  3. Step 3: Cross multiply
    77,274.40x = 115,911.60 × 21,870.88
  4. Step 4: Simplify right side
    77,274.40x = 2,535,088,694.21
  5. Step 5: Solve for x
    x = 2,535,088,694.21/77,274.40
  6. Step 6: Final answer
    x = 32,806.32

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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.