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Finding the Fourth Proportional to 52,656.84, 78,985.62 and 21,069.56

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Solution

The fourth proportional to 52,656.84, 78,985.62 and 21,069.56 is: 31,604.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,656.84 : 78,985.62 = 21,069.56 : x
  2. Step 2: Convert to fraction form
    52,656.84/78,985.62 = 21,069.56/x
  3. Step 3: Cross multiply
    52,656.84x = 78,985.62 × 21,069.56
  4. Step 4: Simplify right side
    52,656.84x = 1,664,192,259.73
  5. Step 5: Solve for x
    x = 1,664,192,259.73/52,656.84
  6. Step 6: Final answer
    x = 31,604.48

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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.