Home / 89,215.78-133,781.30-51,787.32

Finding the Fourth Proportional to 89,215.78, 133,781.30 and 51,787.32

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Solution

The fourth proportional to 89,215.78, 133,781.30 and 51,787.32 is: 77,656.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,215.78 : 133,781.30 = 51,787.32 : x
  2. Step 2: Convert to fraction form
    89,215.78/133,781.30 = 51,787.32/x
  3. Step 3: Cross multiply
    89,215.78x = 133,781.30 × 51,787.32
  4. Step 4: Simplify right side
    89,215.78x = 6,928,175,409.83
  5. Step 5: Solve for x
    x = 6,928,175,409.83/89,215.78
  6. Step 6: Final answer
    x = 77,656.39

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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.