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Finding the Fourth Proportional to 77,679.63, 116,522.01 and 21,520.31

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Solution

The fourth proportional to 77,679.63, 116,522.01 and 21,520.31 is: 32,281.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,679.63 : 116,522.01 = 21,520.31 : x
  2. Step 2: Convert to fraction form
    77,679.63/116,522.01 = 21,520.31/x
  3. Step 3: Cross multiply
    77,679.63x = 116,522.01 × 21,520.31
  4. Step 4: Simplify right side
    77,679.63x = 2,507,589,194.41
  5. Step 5: Solve for x
    x = 2,507,589,194.41/77,679.63
  6. Step 6: Final answer
    x = 32,281.17

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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.