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Finding the Fourth Proportional to 189,703.51, 261,787.66 and 103,660.60

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Solution

The fourth proportional to 189,703.51, 261,787.66 and 103,660.60 is: 143,049.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,703.51 : 261,787.66 = 103,660.60 : x
  2. Step 2: Convert to fraction form
    189,703.51/261,787.66 = 103,660.60/x
  3. Step 3: Cross multiply
    189,703.51x = 261,787.66 × 103,660.60
  4. Step 4: Simplify right side
    189,703.51x = 27,137,065,908.20
  5. Step 5: Solve for x
    x = 27,137,065,908.20/189,703.51
  6. Step 6: Final answer
    x = 143,049.89

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1.5x scale

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.