Home / 128,234.48-192,387.15-53,389.80

Finding the Fourth Proportional to 128,234.48, 192,387.15 and 53,389.80

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Solution

The fourth proportional to 128,234.48, 192,387.15 and 53,389.80 is: 80,099.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,234.48 : 192,387.15 = 53,389.80 : x
  2. Step 2: Convert to fraction form
    128,234.48/192,387.15 = 53,389.80/x
  3. Step 3: Cross multiply
    128,234.48x = 192,387.15 × 53,389.80
  4. Step 4: Simplify right side
    128,234.48x = 10,271,511,461.07
  5. Step 5: Solve for x
    x = 10,271,511,461.07/128,234.48
  6. Step 6: Final answer
    x = 80,099.45

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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.