Home / 135,121.37-186,459.39-74,688.41

Finding the Fourth Proportional to 135,121.37, 186,459.39 and 74,688.41

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Solution

The fourth proportional to 135,121.37, 186,459.39 and 74,688.41 is: 103,065.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,121.37 : 186,459.39 = 74,688.41 : x
  2. Step 2: Convert to fraction form
    135,121.37/186,459.39 = 74,688.41/x
  3. Step 3: Cross multiply
    135,121.37x = 186,459.39 × 74,688.41
  4. Step 4: Simplify right side
    135,121.37x = 13,926,354,436.37
  5. Step 5: Solve for x
    x = 13,926,354,436.37/135,121.37
  6. Step 6: Final answer
    x = 103,065.53

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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.