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Finding the Fourth Proportional to 51,759.84, 77,656.16 and 18,479.16

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Solution

The fourth proportional to 51,759.84, 77,656.16 and 18,479.16 is: 27,724.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,759.84 : 77,656.16 = 18,479.16 : x
  2. Step 2: Convert to fraction form
    51,759.84/77,656.16 = 18,479.16/x
  3. Step 3: Cross multiply
    51,759.84x = 77,656.16 × 18,479.16
  4. Step 4: Simplify right side
    51,759.84x = 1,435,020,513.23
  5. Step 5: Solve for x
    x = 1,435,020,513.23/51,759.84
  6. Step 6: Final answer
    x = 27,724.59

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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.