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Finding the Fourth Proportional to 134,766.21, 185,978.66 and 74,339.40

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Solution

The fourth proportional to 134,766.21, 185,978.66 and 74,339.40 is: 102,589.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,766.21 : 185,978.66 = 74,339.40 : x
  2. Step 2: Convert to fraction form
    134,766.21/185,978.66 = 74,339.40/x
  3. Step 3: Cross multiply
    134,766.21x = 185,978.66 × 74,339.40
  4. Step 4: Simplify right side
    134,766.21x = 13,825,541,485.63
  5. Step 5: Solve for x
    x = 13,825,541,485.63/134,766.21
  6. Step 6: Final answer
    x = 102,589.08

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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.