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Finding the Fourth Proportional to 111,747.69, 154,189.73 and 62,690.97

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Solution

The fourth proportional to 111,747.69, 154,189.73 and 62,690.97 is: 86,501.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,747.69 : 154,189.73 = 62,690.97 : x
  2. Step 2: Convert to fraction form
    111,747.69/154,189.73 = 62,690.97/x
  3. Step 3: Cross multiply
    111,747.69x = 154,189.73 × 62,690.97
  4. Step 4: Simplify right side
    111,747.69x = 9,666,303,424.28
  5. Step 5: Solve for x
    x = 9,666,303,424.28/111,747.69
  6. Step 6: Final answer
    x = 86,501.15

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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.