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Finding the Fourth Proportional to 111,371.36, 153,695.40 and 62,969.40

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Solution

The fourth proportional to 111,371.36, 153,695.40 and 62,969.40 is: 86,899.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,371.36 : 153,695.40 = 62,969.40 : x
  2. Step 2: Convert to fraction form
    111,371.36/153,695.40 = 62,969.40/x
  3. Step 3: Cross multiply
    111,371.36x = 153,695.40 × 62,969.40
  4. Step 4: Simplify right side
    111,371.36x = 9,678,107,120.76
  5. Step 5: Solve for x
    x = 9,678,107,120.76/111,371.36
  6. Step 6: Final answer
    x = 86,899.42

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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.