Home / 135,400.89-186,863.74-74,977.15

Finding the Fourth Proportional to 135,400.89, 186,863.74 and 74,977.15

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Solution

The fourth proportional to 135,400.89, 186,863.74 and 74,977.15 is: 103,474.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,400.89 : 186,863.74 = 74,977.15 : x
  2. Step 2: Convert to fraction form
    135,400.89/186,863.74 = 74,977.15/x
  3. Step 3: Cross multiply
    135,400.89x = 186,863.74 × 74,977.15
  4. Step 4: Simplify right side
    135,400.89x = 14,010,510,663.54
  5. Step 5: Solve for x
    x = 14,010,510,663.54/135,400.89
  6. Step 6: Final answer
    x = 103,474.29

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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.