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Finding the Fourth Proportional to 170,928,009.20, 256,392,013.80 and 80,228,745.20

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Solution

The fourth proportional to 170,928,009.20, 256,392,013.80 and 80,228,745.20 is: 120,343,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,928,009.20 : 256,392,013.80 = 80,228,745.20 : x
  2. Step 2: Convert to fraction form
    170,928,009.20/256,392,013.80 = 80,228,745.20/x
  3. Step 3: Cross multiply
    170,928,009.20x = 256,392,013.80 × 80,228,745.20
  4. Step 4: Simplify right side
    170,928,009.20x = 20,570,009,546,475,084
  5. Step 5: Solve for x
    x = 20,570,009,546,475,084/170,928,009.20
  6. Step 6: Final answer
    x = 120,343,117.80

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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.