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Finding the Fourth Proportional to 86,679.40, 130,062.30 and 49,268.20

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Solution

The fourth proportional to 86,679.40, 130,062.30 and 49,268.20 is: 73,926.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,679.40 : 130,062.30 = 49,268.20 : x
  2. Step 2: Convert to fraction form
    86,679.40/130,062.30 = 49,268.20/x
  3. Step 3: Cross multiply
    86,679.40x = 130,062.30 × 49,268.20
  4. Step 4: Simplify right side
    86,679.40x = 6,407,935,408.86
  5. Step 5: Solve for x
    x = 6,407,935,408.86/86,679.40
  6. Step 6: Final answer
    x = 73,926.85

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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.