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Finding the Fourth Proportional to 111,143.77, 153,368.67 and 62,743.03

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Solution

The fourth proportional to 111,143.77, 153,368.67 and 62,743.03 is: 86,579.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,143.77 : 153,368.67 = 62,743.03 : x
  2. Step 2: Convert to fraction form
    111,143.77/153,368.67 = 62,743.03/x
  3. Step 3: Cross multiply
    111,143.77x = 153,368.67 × 62,743.03
  4. Step 4: Simplify right side
    111,143.77x = 9,622,815,062.87
  5. Step 5: Solve for x
    x = 9,622,815,062.87/111,143.77
  6. Step 6: Final answer
    x = 86,579.89

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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.