Home / 189,868.86-261,780.86-121,765.68

Finding the Fourth Proportional to 189,868.86, 261,780.86 and 121,765.68

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Solution

The fourth proportional to 189,868.86, 261,780.86 and 121,765.68 is: 167,883.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,868.86 : 261,780.86 = 121,765.68 : x
  2. Step 2: Convert to fraction form
    189,868.86/261,780.86 = 121,765.68/x
  3. Step 3: Cross multiply
    189,868.86x = 261,780.86 × 121,765.68
  4. Step 4: Simplify right side
    189,868.86x = 31,875,924,733.30
  5. Step 5: Solve for x
    x = 31,875,924,733.30/189,868.86
  6. Step 6: Final answer
    x = 167,883.90

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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.