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Finding the Fourth Proportional to 77,351.19, 116,026.90 and 21,191.79

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Solution

The fourth proportional to 77,351.19, 116,026.90 and 21,191.79 is: 31,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,351.19 : 116,026.90 = 21,191.79 : x
  2. Step 2: Convert to fraction form
    77,351.19/116,026.90 = 21,191.79/x
  3. Step 3: Cross multiply
    77,351.19x = 116,026.90 × 21,191.79
  4. Step 4: Simplify right side
    77,351.19x = 2,458,817,593.19
  5. Step 5: Solve for x
    x = 2,458,817,593.19/77,351.19
  6. Step 6: Final answer
    x = 31,787.72

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Similar ratio
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1.5x scale

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.