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Finding the Fourth Proportional to 100,839.90, 151,063.02 and 61,298.94

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Solution

The fourth proportional to 100,839.90, 151,063.02 and 61,298.94 is: 91,828.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,839.90 : 151,063.02 = 61,298.94 : x
  2. Step 2: Convert to fraction form
    100,839.90/151,063.02 = 61,298.94/x
  3. Step 3: Cross multiply
    100,839.90x = 151,063.02 × 61,298.94
  4. Step 4: Simplify right side
    100,839.90x = 9,260,002,999.20
  5. Step 5: Solve for x
    x = 9,260,002,999.20/100,839.90
  6. Step 6: Final answer
    x = 91,828.76

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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.