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Finding the Fourth Proportional to 158,450.60, 218,667.86 and 90,478.64

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Solution

The fourth proportional to 158,450.60, 218,667.86 and 90,478.64 is: 124,863.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,450.60 : 218,667.86 = 90,478.64 : x
  2. Step 2: Convert to fraction form
    158,450.60/218,667.86 = 90,478.64/x
  3. Step 3: Cross multiply
    158,450.60x = 218,667.86 × 90,478.64
  4. Step 4: Simplify right side
    158,450.60x = 19,784,769,038.78
  5. Step 5: Solve for x
    x = 19,784,769,038.78/158,450.60
  6. Step 6: Final answer
    x = 124,863.96

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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.