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Finding the Fourth Proportional to 158,609.64, 218,861.06 and 90,631.02

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Solution

The fourth proportional to 158,609.64, 218,861.06 and 90,631.02 is: 125,059.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,609.64 : 218,861.06 = 90,631.02 : x
  2. Step 2: Convert to fraction form
    158,609.64/218,861.06 = 90,631.02/x
  3. Step 3: Cross multiply
    158,609.64x = 218,861.06 × 90,631.02
  4. Step 4: Simplify right side
    158,609.64x = 19,835,601,106.08
  5. Step 5: Solve for x
    x = 19,835,601,106.08/158,609.64
  6. Step 6: Final answer
    x = 125,059.24

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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.