Home / 189,774.09-261,784.61-121,715.34

Finding the Fourth Proportional to 189,774.09, 261,784.61 and 121,715.34

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Solution

The fourth proportional to 189,774.09, 261,784.61 and 121,715.34 is: 167,900.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,774.09 : 261,784.61 = 121,715.34 : x
  2. Step 2: Convert to fraction form
    189,774.09/261,784.61 = 121,715.34/x
  3. Step 3: Cross multiply
    189,774.09x = 261,784.61 × 121,715.34
  4. Step 4: Simplify right side
    189,774.09x = 31,863,202,204.34
  5. Step 5: Solve for x
    x = 31,863,202,204.34/189,774.09
  6. Step 6: Final answer
    x = 167,900.70

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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.