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Finding the Fourth Proportional to 134,871.84, 186,123.81 and 74,442.60

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Solution

The fourth proportional to 134,871.84, 186,123.81 and 74,442.60 is: 102,731.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,871.84 : 186,123.81 = 74,442.60 : x
  2. Step 2: Convert to fraction form
    134,871.84/186,123.81 = 74,442.60/x
  3. Step 3: Cross multiply
    134,871.84x = 186,123.81 × 74,442.60
  4. Step 4: Simplify right side
    134,871.84x = 13,855,540,338.31
  5. Step 5: Solve for x
    x = 13,855,540,338.31/134,871.84
  6. Step 6: Final answer
    x = 102,731.16

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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.