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Finding the Fourth Proportional to 134,645.10, 185,811.54 and 74,218.11

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Solution

The fourth proportional to 134,645.10, 185,811.54 and 74,218.11 is: 102,421.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,645.10 : 185,811.54 = 74,218.11 : x
  2. Step 2: Convert to fraction form
    134,645.10/185,811.54 = 74,218.11/x
  3. Step 3: Cross multiply
    134,645.10x = 185,811.54 × 74,218.11
  4. Step 4: Simplify right side
    134,645.10x = 13,790,581,314.99
  5. Step 5: Solve for x
    x = 13,790,581,314.99/134,645.10
  6. Step 6: Final answer
    x = 102,421.71

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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.