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Finding the Fourth Proportional to 300,011.78, 450,018.12 and 122,518.82

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Solution

The fourth proportional to 300,011.78, 450,018.12 and 122,518.82 is: 183,778.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,011.78 : 450,018.12 = 122,518.82 : x
  2. Step 2: Convert to fraction form
    300,011.78/450,018.12 = 122,518.82/x
  3. Step 3: Cross multiply
    300,011.78x = 450,018.12 × 122,518.82
  4. Step 4: Simplify right side
    300,011.78x = 55,135,689,041.02
  5. Step 5: Solve for x
    x = 55,135,689,041.02/300,011.78
  6. Step 6: Final answer
    x = 183,778.41

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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.