Home / 189,886.11-261,804.66-121,782.93

Finding the Fourth Proportional to 189,886.11, 261,804.66 and 121,782.93

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Solution

The fourth proportional to 189,886.11, 261,804.66 and 121,782.93 is: 167,907.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,886.11 : 261,804.66 = 121,782.93 : x
  2. Step 2: Convert to fraction form
    189,886.11/261,804.66 = 121,782.93/x
  3. Step 3: Cross multiply
    189,886.11x = 261,804.66 × 121,782.93
  4. Step 4: Simplify right side
    189,886.11x = 31,883,338,582.45
  5. Step 5: Solve for x
    x = 31,883,338,582.45/189,886.11
  6. Step 6: Final answer
    x = 167,907.69

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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.