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Finding the Fourth Proportional to 312,425.91, 468,565.74 and 87,807.87

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Solution

The fourth proportional to 312,425.91, 468,565.74 and 87,807.87 is: 131,691.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,425.91 : 468,565.74 = 87,807.87 : x
  2. Step 2: Convert to fraction form
    312,425.91/468,565.74 = 87,807.87/x
  3. Step 3: Cross multiply
    312,425.91x = 468,565.74 × 87,807.87
  4. Step 4: Simplify right side
    312,425.91x = 41,143,759,584.37
  5. Step 5: Solve for x
    x = 41,143,759,584.37/312,425.91
  6. Step 6: Final answer
    x = 131,691.25

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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.