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Finding the Fourth Proportional to 128,331.63, 192,368.20 and 53,493.20

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Solution

The fourth proportional to 128,331.63, 192,368.20 and 53,493.20 is: 80,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,331.63 : 192,368.20 = 53,493.20 : x
  2. Step 2: Convert to fraction form
    128,331.63/192,368.20 = 53,493.20/x
  3. Step 3: Cross multiply
    128,331.63x = 192,368.20 × 53,493.20
  4. Step 4: Simplify right side
    128,331.63x = 10,290,390,596.24
  5. Step 5: Solve for x
    x = 10,290,390,596.24/128,331.63
  6. Step 6: Final answer
    x = 80,185.93

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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.