Home / 189,436.47-261,420.60-103,394.61

Finding the Fourth Proportional to 189,436.47, 261,420.60 and 103,394.61

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Solution

The fourth proportional to 189,436.47, 261,420.60 and 103,394.61 is: 142,683.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,436.47 : 261,420.60 = 103,394.61 : x
  2. Step 2: Convert to fraction form
    189,436.47/261,420.60 = 103,394.61/x
  3. Step 3: Cross multiply
    189,436.47x = 261,420.60 × 103,394.61
  4. Step 4: Simplify right side
    189,436.47x = 27,029,480,982.97
  5. Step 5: Solve for x
    x = 27,029,480,982.97/189,436.47
  6. Step 6: Final answer
    x = 142,683.62

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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.