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Finding the Fourth Proportional to 86,845.80, 130,074.30 and 51,853.80

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Solution

The fourth proportional to 86,845.80, 130,074.30 and 51,853.80 is: 77,664.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,845.80 : 130,074.30 = 51,853.80 : x
  2. Step 2: Convert to fraction form
    86,845.80/130,074.30 = 51,853.80/x
  3. Step 3: Cross multiply
    86,845.80x = 130,074.30 × 51,853.80
  4. Step 4: Simplify right side
    86,845.80x = 6,744,846,737.34
  5. Step 5: Solve for x
    x = 6,744,846,737.34/86,845.80
  6. Step 6: Final answer
    x = 77,664.63

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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.