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Finding the Fourth Proportional to 111,335.88, 153,649.80 and 66,040.68

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Solution

The fourth proportional to 111,335.88, 153,649.80 and 66,040.68 is: 91,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,335.88 : 153,649.80 = 66,040.68 : x
  2. Step 2: Convert to fraction form
    111,335.88/153,649.80 = 66,040.68/x
  3. Step 3: Cross multiply
    111,335.88x = 153,649.80 × 66,040.68
  4. Step 4: Simplify right side
    111,335.88x = 10,147,137,273.86
  5. Step 5: Solve for x
    x = 10,147,137,273.86/111,335.88
  6. Step 6: Final answer
    x = 91,139.87

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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.