Home / 189,780.08-261,896.47-103,739.40

Finding the Fourth Proportional to 189,780.08, 261,896.47 and 103,739.40

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Solution

The fourth proportional to 189,780.08, 261,896.47 and 103,739.40 is: 143,160.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,780.08 : 261,896.47 = 103,739.40 : x
  2. Step 2: Convert to fraction form
    189,780.08/261,896.47 = 103,739.40/x
  3. Step 3: Cross multiply
    189,780.08x = 261,896.47 × 103,739.40
  4. Step 4: Simplify right side
    189,780.08x = 27,168,982,400.57
  5. Step 5: Solve for x
    x = 27,168,982,400.57/189,780.08
  6. Step 6: Final answer
    x = 143,160.35

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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.