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Finding the Fourth Proportional to 86,771.70, 130,169.70 and 36,851.40

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Solution

The fourth proportional to 86,771.70, 130,169.70 and 36,851.40 is: 55,282.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,771.70 : 130,169.70 = 36,851.40 : x
  2. Step 2: Convert to fraction form
    86,771.70/130,169.70 = 36,851.40/x
  3. Step 3: Cross multiply
    86,771.70x = 130,169.70 × 36,851.40
  4. Step 4: Simplify right side
    86,771.70x = 4,796,935,682.58
  5. Step 5: Solve for x
    x = 4,796,935,682.58/86,771.70
  6. Step 6: Final answer
    x = 55,282.26

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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.