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Finding the Fourth Proportional to 111,403.56, 153,650.02 and 68,985.64

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Solution

The fourth proportional to 111,403.56, 153,650.02 and 68,985.64 is: 95,146.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,403.56 : 153,650.02 = 68,985.64 : x
  2. Step 2: Convert to fraction form
    111,403.56/153,650.02 = 68,985.64/x
  3. Step 3: Cross multiply
    111,403.56x = 153,650.02 × 68,985.64
  4. Step 4: Simplify right side
    111,403.56x = 10,599,644,965.71
  5. Step 5: Solve for x
    x = 10,599,644,965.71/111,403.56
  6. Step 6: Final answer
    x = 95,146.38

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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.