Home / 191,749.20-287,623.80-120,890.40

Finding the Fourth Proportional to 191,749.20, 287,623.80 and 120,890.40

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Solution

The fourth proportional to 191,749.20, 287,623.80 and 120,890.40 is: 181,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,749.20 : 287,623.80 = 120,890.40 : x
  2. Step 2: Convert to fraction form
    191,749.20/287,623.80 = 120,890.40/x
  3. Step 3: Cross multiply
    191,749.20x = 287,623.80 × 120,890.40
  4. Step 4: Simplify right side
    191,749.20x = 34,770,956,231.52
  5. Step 5: Solve for x
    x = 34,770,956,231.52/191,749.20
  6. Step 6: Final answer
    x = 181,335.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.