Home / 191,972.20-287,958.30-128,986.60

Finding the Fourth Proportional to 191,972.20, 287,958.30 and 128,986.60

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Solution

The fourth proportional to 191,972.20, 287,958.30 and 128,986.60 is: 193,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,972.20 : 287,958.30 = 128,986.60 : x
  2. Step 2: Convert to fraction form
    191,972.20/287,958.30 = 128,986.60/x
  3. Step 3: Cross multiply
    191,972.20x = 287,958.30 × 128,986.60
  4. Step 4: Simplify right side
    191,972.20x = 37,142,762,058.78
  5. Step 5: Solve for x
    x = 37,142,762,058.78/191,972.20
  6. Step 6: Final answer
    x = 193,479.90

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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.