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Finding the Fourth Proportional to 86,598, 129,521.75 and 50,974.43

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Solution

The fourth proportional to 86,598, 129,521.75 and 50,974.43 is: 76,240.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598 : 129,521.75 = 50,974.43 : x
  2. Step 2: Convert to fraction form
    86,598/129,521.75 = 50,974.43/x
  3. Step 3: Cross multiply
    86,598x = 129,521.75 × 50,974.43
  4. Step 4: Simplify right side
    86,598x = 6,602,296,476.37
  5. Step 5: Solve for x
    x = 6,602,296,476.37/86,598
  6. Step 6: Final answer
    x = 76,240.75

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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.