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Finding the Fourth Proportional to 158,365.81, 218,548.29 and 90,381.43

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Solution

The fourth proportional to 158,365.81, 218,548.29 and 90,381.43 is: 124,728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,365.81 : 218,548.29 = 90,381.43 : x
  2. Step 2: Convert to fraction form
    158,365.81/218,548.29 = 90,381.43/x
  3. Step 3: Cross multiply
    158,365.81x = 218,548.29 × 90,381.43
  4. Step 4: Simplify right side
    158,365.81x = 19,752,706,974.25
  5. Step 5: Solve for x
    x = 19,752,706,974.25/158,365.81
  6. Step 6: Final answer
    x = 124,728.36

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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.