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Finding the Fourth Proportional to 87,465.81, 120,713.45 and 49,239.69

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Solution

The fourth proportional to 87,465.81, 120,713.45 and 49,239.69 is: 67,956.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,465.81 : 120,713.45 = 49,239.69 : x
  2. Step 2: Convert to fraction form
    87,465.81/120,713.45 = 49,239.69/x
  3. Step 3: Cross multiply
    87,465.81x = 120,713.45 × 49,239.69
  4. Step 4: Simplify right side
    87,465.81x = 5,943,892,856.83
  5. Step 5: Solve for x
    x = 5,943,892,856.83/87,465.81
  6. Step 6: Final answer
    x = 67,956.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.