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Finding the Fourth Proportional to 78,611.84, 117,881.45 and 25,293.89

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Solution

The fourth proportional to 78,611.84, 117,881.45 and 25,293.89 is: 37,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,611.84 : 117,881.45 = 25,293.89 : x
  2. Step 2: Convert to fraction form
    78,611.84/117,881.45 = 25,293.89/x
  3. Step 3: Cross multiply
    78,611.84x = 117,881.45 × 25,293.89
  4. Step 4: Simplify right side
    78,611.84x = 2,981,679,713.46
  5. Step 5: Solve for x
    x = 2,981,679,713.46/78,611.84
  6. Step 6: Final answer
    x = 37,929.15

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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.