Home / 189,870.86-261,783.62-121,767.68

Finding the Fourth Proportional to 189,870.86, 261,783.62 and 121,767.68

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Solution

The fourth proportional to 189,870.86, 261,783.62 and 121,767.68 is: 167,886.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,870.86 : 261,783.62 = 121,767.68 : x
  2. Step 2: Convert to fraction form
    189,870.86/261,783.62 = 121,767.68/x
  3. Step 3: Cross multiply
    189,870.86x = 261,783.62 × 121,767.68
  4. Step 4: Simplify right side
    189,870.86x = 31,876,784,069.40
  5. Step 5: Solve for x
    x = 31,876,784,069.40/189,870.86
  6. Step 6: Final answer
    x = 167,886.66

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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.