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Finding the Fourth Proportional to 101,612.88, 152,512.88 and 51,728.63

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Solution

The fourth proportional to 101,612.88, 152,512.88 and 51,728.63 is: 77,640.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,612.88 : 152,512.88 = 51,728.63 : x
  2. Step 2: Convert to fraction form
    101,612.88/152,512.88 = 51,728.63/x
  3. Step 3: Cross multiply
    101,612.88x = 152,512.88 × 51,728.63
  4. Step 4: Simplify right side
    101,612.88x = 7,889,281,318.55
  5. Step 5: Solve for x
    x = 7,889,281,318.55/101,612.88
  6. Step 6: Final answer
    x = 77,640.56

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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.