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Finding the Fourth Proportional to 86,700.20, 130,069.20 and 49,278.20

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Solution

The fourth proportional to 86,700.20, 130,069.20 and 49,278.20 is: 73,928.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,700.20 : 130,069.20 = 49,278.20 : x
  2. Step 2: Convert to fraction form
    86,700.20/130,069.20 = 49,278.20/x
  3. Step 3: Cross multiply
    86,700.20x = 130,069.20 × 49,278.20
  4. Step 4: Simplify right side
    86,700.20x = 6,409,576,051.44
  5. Step 5: Solve for x
    x = 6,409,576,051.44/86,700.20
  6. Step 6: Final answer
    x = 73,928.04

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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.