Home / 128,518.04-192,441.72-103,421.00

Finding the Fourth Proportional to 128,518.04, 192,441.72 and 103,421.00

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Solution

The fourth proportional to 128,518.04, 192,441.72 and 103,421.00 is: 154,861.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,518.04 : 192,441.72 = 103,421.00 : x
  2. Step 2: Convert to fraction form
    128,518.04/192,441.72 = 103,421.00/x
  3. Step 3: Cross multiply
    128,518.04x = 192,441.72 × 103,421.00
  4. Step 4: Simplify right side
    128,518.04x = 19,902,515,993.05
  5. Step 5: Solve for x
    x = 19,902,515,993.05/128,518.04
  6. Step 6: Final answer
    x = 154,861.65

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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.