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Finding the Fourth Proportional to 158,292.36, 218,442.44 and 85,694.72

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Solution

The fourth proportional to 158,292.36, 218,442.44 and 85,694.72 is: 118,258.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,292.36 : 218,442.44 = 85,694.72 : x
  2. Step 2: Convert to fraction form
    158,292.36/218,442.44 = 85,694.72/x
  3. Step 3: Cross multiply
    158,292.36x = 218,442.44 × 85,694.72
  4. Step 4: Simplify right side
    158,292.36x = 18,719,362,853.94
  5. Step 5: Solve for x
    x = 18,719,362,853.94/158,292.36
  6. Step 6: Final answer
    x = 118,258.16

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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.