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Finding the Fourth Proportional to 159,305.56, 238,880.40 and 90,909.16

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Solution

The fourth proportional to 159,305.56, 238,880.40 and 90,909.16 is: 136,319.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,305.56 : 238,880.40 = 90,909.16 : x
  2. Step 2: Convert to fraction form
    159,305.56/238,880.40 = 90,909.16/x
  3. Step 3: Cross multiply
    159,305.56x = 238,880.40 × 90,909.16
  4. Step 4: Simplify right side
    159,305.56x = 21,716,416,504.46
  5. Step 5: Solve for x
    x = 21,716,416,504.46/159,305.56
  6. Step 6: Final answer
    x = 136,319.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.