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Finding the Fourth Proportional to 86,638.30, 130,015.05 and 49,198.30

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Solution

The fourth proportional to 86,638.30, 130,015.05 and 49,198.30 is: 73,830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,638.30 : 130,015.05 = 49,198.30 : x
  2. Step 2: Convert to fraction form
    86,638.30/130,015.05 = 49,198.30/x
  3. Step 3: Cross multiply
    86,638.30x = 130,015.05 × 49,198.30
  4. Step 4: Simplify right side
    86,638.30x = 6,396,519,434.42
  5. Step 5: Solve for x
    x = 6,396,519,434.42/86,638.30
  6. Step 6: Final answer
    x = 73,830.16

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1.5x scale

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.