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Finding the Fourth Proportional to 128,335.64, 192,374.18 and 53,497.20

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Solution

The fourth proportional to 128,335.64, 192,374.18 and 53,497.20 is: 80,191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,335.64 : 192,374.18 = 53,497.20 : x
  2. Step 2: Convert to fraction form
    128,335.64/192,374.18 = 53,497.20/x
  3. Step 3: Cross multiply
    128,335.64x = 192,374.18 × 53,497.20
  4. Step 4: Simplify right side
    128,335.64x = 10,291,479,982.30
  5. Step 5: Solve for x
    x = 10,291,479,982.30/128,335.64
  6. Step 6: Final answer
    x = 80,191.91

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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.