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Finding the Fourth Proportional to 134,627.80, 185,785.50 and 74,198.50

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Solution

The fourth proportional to 134,627.80, 185,785.50 and 74,198.50 is: 102,393.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,627.80 : 185,785.50 = 74,198.50 : x
  2. Step 2: Convert to fraction form
    134,627.80/185,785.50 = 74,198.50/x
  3. Step 3: Cross multiply
    134,627.80x = 185,785.50 × 74,198.50
  4. Step 4: Simplify right side
    134,627.80x = 13,785,005,421.75
  5. Step 5: Solve for x
    x = 13,785,005,421.75/134,627.80
  6. Step 6: Final answer
    x = 102,393.45

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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.