Home / 128,015.39-191,940.87-53,187.23

Finding the Fourth Proportional to 128,015.39, 191,940.87 and 53,187.23

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Solution

The fourth proportional to 128,015.39, 191,940.87 and 53,187.23 is: 79,746.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.39 : 191,940.87 = 53,187.23 : x
  2. Step 2: Convert to fraction form
    128,015.39/191,940.87 = 53,187.23/x
  3. Step 3: Cross multiply
    128,015.39x = 191,940.87 × 53,187.23
  4. Step 4: Simplify right side
    128,015.39x = 10,208,803,199.09
  5. Step 5: Solve for x
    x = 10,208,803,199.09/128,015.39
  6. Step 6: Final answer
    x = 79,746.69

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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.