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Finding the Fourth Proportional to 86,787.63, 130,067.69 and 49,364.91

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Solution

The fourth proportional to 86,787.63, 130,067.69 and 49,364.91 is: 73,982.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,787.63 : 130,067.69 = 49,364.91 : x
  2. Step 2: Convert to fraction form
    86,787.63/130,067.69 = 49,364.91/x
  3. Step 3: Cross multiply
    86,787.63x = 130,067.69 × 49,364.91
  4. Step 4: Simplify right side
    86,787.63x = 6,420,779,563.93
  5. Step 5: Solve for x
    x = 6,420,779,563.93/86,787.63
  6. Step 6: Final answer
    x = 73,982.66

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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.