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Finding the Fourth Proportional to 86,729.70, 130,106.70 and 36,809.40

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Solution

The fourth proportional to 86,729.70, 130,106.70 and 36,809.40 is: 55,219.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,729.70 : 130,106.70 = 36,809.40 : x
  2. Step 2: Convert to fraction form
    86,729.70/130,106.70 = 36,809.40/x
  3. Step 3: Cross multiply
    86,729.70x = 130,106.70 × 36,809.40
  4. Step 4: Simplify right side
    86,729.70x = 4,789,149,562.98
  5. Step 5: Solve for x
    x = 4,789,149,562.98/86,729.70
  6. Step 6: Final answer
    x = 55,219.26

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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.