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Finding the Fourth Proportional to 77,680.88, 116,523.89 and 21,521.55

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Solution

The fourth proportional to 77,680.88, 116,523.89 and 21,521.55 is: 32,283.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,680.88 : 116,523.89 = 21,521.55 : x
  2. Step 2: Convert to fraction form
    77,680.88/116,523.89 = 21,521.55/x
  3. Step 3: Cross multiply
    77,680.88x = 116,523.89 × 21,521.55
  4. Step 4: Simplify right side
    77,680.88x = 2,507,774,617.22
  5. Step 5: Solve for x
    x = 2,507,774,617.22/77,680.88
  6. Step 6: Final answer
    x = 32,283.04

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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.