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Finding the Fourth Proportional to 134,804.78, 186,031.61 and 74,377.63

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Solution

The fourth proportional to 134,804.78, 186,031.61 and 74,377.63 is: 102,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,804.78 : 186,031.61 = 74,377.63 : x
  2. Step 2: Convert to fraction form
    134,804.78/186,031.61 = 74,377.63/x
  3. Step 3: Cross multiply
    134,804.78x = 186,031.61 × 74,377.63
  4. Step 4: Simplify right side
    134,804.78x = 13,836,589,977.75
  5. Step 5: Solve for x
    x = 13,836,589,977.75/134,804.78
  6. Step 6: Final answer
    x = 102,641.68

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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.