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Finding the Fourth Proportional to 157,871.25, 217,862.33 and 90,803.25

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Solution

The fourth proportional to 157,871.25, 217,862.33 and 90,803.25 is: 125,308.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,871.25 : 217,862.33 = 90,803.25 : x
  2. Step 2: Convert to fraction form
    157,871.25/217,862.33 = 90,803.25/x
  3. Step 3: Cross multiply
    157,871.25x = 217,862.33 × 90,803.25
  4. Step 4: Simplify right side
    157,871.25x = 19,782,607,162.56
  5. Step 5: Solve for x
    x = 19,782,607,162.56/157,871.25
  6. Step 6: Final answer
    x = 125,308.49

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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.