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Finding the Fourth Proportional to 128,461.68, 192,624.48 and 45,297.36

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Solution

The fourth proportional to 128,461.68, 192,624.48 and 45,297.36 is: 67,922.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,461.68 : 192,624.48 = 45,297.36 : x
  2. Step 2: Convert to fraction form
    128,461.68/192,624.48 = 45,297.36/x
  3. Step 3: Cross multiply
    128,461.68x = 192,624.48 × 45,297.36
  4. Step 4: Simplify right side
    128,461.68x = 8,725,380,415.37
  5. Step 5: Solve for x
    x = 8,725,380,415.37/128,461.68
  6. Step 6: Final answer
    x = 67,922.05

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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.