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Finding the Fourth Proportional to 98,993.05, 136,609.97 and 53,670.89

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Solution

The fourth proportional to 98,993.05, 136,609.97 and 53,670.89 is: 74,065.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,993.05 : 136,609.97 = 53,670.89 : x
  2. Step 2: Convert to fraction form
    98,993.05/136,609.97 = 53,670.89/x
  3. Step 3: Cross multiply
    98,993.05x = 136,609.97 × 53,670.89
  4. Step 4: Simplify right side
    98,993.05x = 7,331,977,721.37
  5. Step 5: Solve for x
    x = 7,331,977,721.37/98,993.05
  6. Step 6: Final answer
    x = 74,065.58

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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.