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Finding the Fourth Proportional to 153,682.52, 212,054.62 and 85,694.08

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Solution

The fourth proportional to 153,682.52, 212,054.62 and 85,694.08 is: 118,242.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,682.52 : 212,054.62 = 85,694.08 : x
  2. Step 2: Convert to fraction form
    153,682.52/212,054.62 = 85,694.08/x
  3. Step 3: Cross multiply
    153,682.52x = 212,054.62 × 85,694.08
  4. Step 4: Simplify right side
    153,682.52x = 18,171,825,570.65
  5. Step 5: Solve for x
    x = 18,171,825,570.65/153,682.52
  6. Step 6: Final answer
    x = 118,242.63

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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.