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Finding the Fourth Proportional to 158,361.85, 218,485.11 and 90,329.68

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Solution

The fourth proportional to 158,361.85, 218,485.11 and 90,329.68 is: 124,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,361.85 : 218,485.11 = 90,329.68 : x
  2. Step 2: Convert to fraction form
    158,361.85/218,485.11 = 90,329.68/x
  3. Step 3: Cross multiply
    158,361.85x = 218,485.11 × 90,329.68
  4. Step 4: Simplify right side
    158,361.85x = 19,735,690,071.06
  5. Step 5: Solve for x
    x = 19,735,690,071.06/158,361.85
  6. Step 6: Final answer
    x = 124,624.02

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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.