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Finding the Fourth Proportional to 86,940.43, 130,322.41 and 49,422.98

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Solution

The fourth proportional to 86,940.43, 130,322.41 and 49,422.98 is: 74,084.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,940.43 : 130,322.41 = 49,422.98 : x
  2. Step 2: Convert to fraction form
    86,940.43/130,322.41 = 49,422.98/x
  3. Step 3: Cross multiply
    86,940.43x = 130,322.41 × 49,422.98
  4. Step 4: Simplify right side
    86,940.43x = 6,440,921,295.79
  5. Step 5: Solve for x
    x = 6,440,921,295.79/86,940.43
  6. Step 6: Final answer
    x = 74,084.31

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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.