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Finding the Fourth Proportional to 98,754.66, 136,007.91 and 85,321.62

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Solution

The fourth proportional to 98,754.66, 136,007.91 and 85,321.62 is: 117,507.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,754.66 : 136,007.91 = 85,321.62 : x
  2. Step 2: Convert to fraction form
    98,754.66/136,007.91 = 85,321.62/x
  3. Step 3: Cross multiply
    98,754.66x = 136,007.91 × 85,321.62
  4. Step 4: Simplify right side
    98,754.66x = 11,604,415,214.01
  5. Step 5: Solve for x
    x = 11,604,415,214.01/98,754.66
  6. Step 6: Final answer
    x = 117,507.52

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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.