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Finding the Fourth Proportional to 154,352.86, 212,939.35 and 90,661.94

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Solution

The fourth proportional to 154,352.86, 212,939.35 and 90,661.94 is: 125,073.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,352.86 : 212,939.35 = 90,661.94 : x
  2. Step 2: Convert to fraction form
    154,352.86/212,939.35 = 90,661.94/x
  3. Step 3: Cross multiply
    154,352.86x = 212,939.35 × 90,661.94
  4. Step 4: Simplify right side
    154,352.86x = 19,305,494,573.34
  5. Step 5: Solve for x
    x = 19,305,494,573.34/154,352.86
  6. Step 6: Final answer
    x = 125,073.77

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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.