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Finding the Fourth Proportional to 98,997.52, 136,484.41 and 78,647.11

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Solution

The fourth proportional to 98,997.52, 136,484.41 and 78,647.11 is: 108,428.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,997.52 : 136,484.41 = 78,647.11 : x
  2. Step 2: Convert to fraction form
    98,997.52/136,484.41 = 78,647.11/x
  3. Step 3: Cross multiply
    98,997.52x = 136,484.41 × 78,647.11
  4. Step 4: Simplify right side
    98,997.52x = 10,734,104,406.56
  5. Step 5: Solve for x
    x = 10,734,104,406.56/98,997.52
  6. Step 6: Final answer
    x = 108,428.01

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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.