Home / 189,909.82-261,951.77-121,818.94

Finding the Fourth Proportional to 189,909.82, 261,951.77 and 121,818.94

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Solution

The fourth proportional to 189,909.82, 261,951.77 and 121,818.94 is: 168,030.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,909.82 : 261,951.77 = 121,818.94 : x
  2. Step 2: Convert to fraction form
    189,909.82/261,951.77 = 121,818.94/x
  3. Step 3: Cross multiply
    189,909.82x = 261,951.77 × 121,818.94
  4. Step 4: Simplify right side
    189,909.82x = 31,910,686,602.19
  5. Step 5: Solve for x
    x = 31,910,686,602.19/189,909.82
  6. Step 6: Final answer
    x = 168,030.74

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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.