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Finding the Fourth Proportional to 287,863.74, 431,794.98 and 77,501.88

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Solution

The fourth proportional to 287,863.74, 431,794.98 and 77,501.88 is: 116,252.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,863.74 : 431,794.98 = 77,501.88 : x
  2. Step 2: Convert to fraction form
    287,863.74/431,794.98 = 77,501.88/x
  3. Step 3: Cross multiply
    287,863.74x = 431,794.98 × 77,501.88
  4. Step 4: Simplify right side
    287,863.74x = 33,464,922,724.56
  5. Step 5: Solve for x
    x = 33,464,922,724.56/287,863.74
  6. Step 6: Final answer
    x = 116,252.65

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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.