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Finding the Fourth Proportional to 111,301.89, 153,619.77 and 102,335.19

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Solution

The fourth proportional to 111,301.89, 153,619.77 and 102,335.19 is: 141,243.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,301.89 : 153,619.77 = 102,335.19 : x
  2. Step 2: Convert to fraction form
    111,301.89/153,619.77 = 102,335.19/x
  3. Step 3: Cross multiply
    111,301.89x = 153,619.77 × 102,335.19
  4. Step 4: Simplify right side
    111,301.89x = 15,720,708,350.71
  5. Step 5: Solve for x
    x = 15,720,708,350.71/111,301.89
  6. Step 6: Final answer
    x = 141,243.86

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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.