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Finding the Fourth Proportional to 157,871.94, 217,866.41 and 86,256.39

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Solution

The fourth proportional to 157,871.94, 217,866.41 and 86,256.39 is: 119,035.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,871.94 : 217,866.41 = 86,256.39 : x
  2. Step 2: Convert to fraction form
    157,871.94/217,866.41 = 86,256.39/x
  3. Step 3: Cross multiply
    157,871.94x = 217,866.41 × 86,256.39
  4. Step 4: Simplify right side
    157,871.94x = 18,792,370,028.86
  5. Step 5: Solve for x
    x = 18,792,370,028.86/157,871.94
  6. Step 6: Final answer
    x = 119,035.53

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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.