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Finding the Fourth Proportional to 100,628.94, 150,768.78 and 61,102.56

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Solution

The fourth proportional to 100,628.94, 150,768.78 and 61,102.56 is: 91,547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,628.94 : 150,768.78 = 61,102.56 : x
  2. Step 2: Convert to fraction form
    100,628.94/150,768.78 = 61,102.56/x
  3. Step 3: Cross multiply
    100,628.94x = 150,768.78 × 61,102.56
  4. Step 4: Simplify right side
    100,628.94x = 9,212,358,426.08
  5. Step 5: Solve for x
    x = 9,212,358,426.08/100,628.94
  6. Step 6: Final answer
    x = 91,547.80

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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.