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Finding the Fourth Proportional to 100,939.76, 151,549.74 and 51,054.96

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Solution

The fourth proportional to 100,939.76, 151,549.74 and 51,054.96 is: 76,653.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.76 : 151,549.74 = 51,054.96 : x
  2. Step 2: Convert to fraction form
    100,939.76/151,549.74 = 51,054.96/x
  3. Step 3: Cross multiply
    100,939.76x = 151,549.74 × 51,054.96
  4. Step 4: Simplify right side
    100,939.76x = 7,737,365,913.71
  5. Step 5: Solve for x
    x = 7,737,365,913.71/100,939.76
  6. Step 6: Final answer
    x = 76,653.31

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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.