Home / 189,721.15-261,818.64-103,683.78

Finding the Fourth Proportional to 189,721.15, 261,818.64 and 103,683.78

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Solution

The fourth proportional to 189,721.15, 261,818.64 and 103,683.78 is: 143,085.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,721.15 : 261,818.64 = 103,683.78 : x
  2. Step 2: Convert to fraction form
    189,721.15/261,818.64 = 103,683.78/x
  3. Step 3: Cross multiply
    189,721.15x = 261,818.64 × 103,683.78
  4. Step 4: Simplify right side
    189,721.15x = 27,146,346,269.66
  5. Step 5: Solve for x
    x = 27,146,346,269.66/189,721.15
  6. Step 6: Final answer
    x = 143,085.51

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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.