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Finding the Fourth Proportional to 153,974.52, 212,505.93 and 85,995.68

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Solution

The fourth proportional to 153,974.52, 212,505.93 and 85,995.68 is: 118,685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,974.52 : 212,505.93 = 85,995.68 : x
  2. Step 2: Convert to fraction form
    153,974.52/212,505.93 = 85,995.68/x
  3. Step 3: Cross multiply
    153,974.52x = 212,505.93 × 85,995.68
  4. Step 4: Simplify right side
    153,974.52x = 18,274,590,891.85
  5. Step 5: Solve for x
    x = 18,274,590,891.85/153,974.52
  6. Step 6: Final answer
    x = 118,685.81

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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.