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Finding the Fourth Proportional to 111,339.88, 153,655.32 and 66,044.68

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Solution

The fourth proportional to 111,339.88, 153,655.32 and 66,044.68 is: 91,145.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,339.88 : 153,655.32 = 66,044.68 : x
  2. Step 2: Convert to fraction form
    111,339.88/153,655.32 = 66,044.68/x
  3. Step 3: Cross multiply
    111,339.88x = 153,655.32 × 66,044.68
  4. Step 4: Simplify right side
    111,339.88x = 10,148,116,439.70
  5. Step 5: Solve for x
    x = 10,148,116,439.70/111,339.88
  6. Step 6: Final answer
    x = 91,145.39

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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.