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Finding the Fourth Proportional to 157,878.54, 217,869.82 and 86,257.02

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Solution

The fourth proportional to 157,878.54, 217,869.82 and 86,257.02 is: 119,033.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,878.54 : 217,869.82 = 86,257.02 : x
  2. Step 2: Convert to fraction form
    157,878.54/217,869.82 = 86,257.02/x
  3. Step 3: Cross multiply
    157,878.54x = 217,869.82 × 86,257.02
  4. Step 4: Simplify right side
    157,878.54x = 18,792,801,421.14
  5. Step 5: Solve for x
    x = 18,792,801,421.14/157,878.54
  6. Step 6: Final answer
    x = 119,033.29

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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.