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Finding the Fourth Proportional to 86,115.17, 118,838.40 and 48,389.42

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Solution

The fourth proportional to 86,115.17, 118,838.40 and 48,389.42 is: 66,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,115.17 : 118,838.40 = 48,389.42 : x
  2. Step 2: Convert to fraction form
    86,115.17/118,838.40 = 48,389.42/x
  3. Step 3: Cross multiply
    86,115.17x = 118,838.40 × 48,389.42
  4. Step 4: Simplify right side
    86,115.17x = 5,750,521,249.73
  5. Step 5: Solve for x
    x = 5,750,521,249.73/86,115.17
  6. Step 6: Final answer
    x = 66,777.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.