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Finding the Fourth Proportional to 134,643.10, 185,808.78 and 74,216.11

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Solution

The fourth proportional to 134,643.10, 185,808.78 and 74,216.11 is: 102,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,643.10 : 185,808.78 = 74,216.11 : x
  2. Step 2: Convert to fraction form
    134,643.10/185,808.78 = 74,216.11/x
  3. Step 3: Cross multiply
    134,643.10x = 185,808.78 × 74,216.11
  4. Step 4: Simplify right side
    134,643.10x = 13,790,004,855.45
  5. Step 5: Solve for x
    x = 13,790,004,855.45/134,643.10
  6. Step 6: Final answer
    x = 102,418.95

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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.