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Finding the Fourth Proportional to 128,549.08, 192,794.46 and 45,443.08

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Solution

The fourth proportional to 128,549.08, 192,794.46 and 45,443.08 is: 68,154.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,549.08 : 192,794.46 = 45,443.08 : x
  2. Step 2: Convert to fraction form
    128,549.08/192,794.46 = 45,443.08/x
  3. Step 3: Cross multiply
    128,549.08x = 192,794.46 × 45,443.08
  4. Step 4: Simplify right side
    128,549.08x = 8,761,174,069.34
  5. Step 5: Solve for x
    x = 8,761,174,069.34/128,549.08
  6. Step 6: Final answer
    x = 68,154.31

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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.