Home / 128,009.08-191,040.26-113,821.69

Finding the Fourth Proportional to 128,009.08, 191,040.26 and 113,821.69

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Solution

The fourth proportional to 128,009.08, 191,040.26 and 113,821.69 is: 169,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,009.08 : 191,040.26 = 113,821.69 : x
  2. Step 2: Convert to fraction form
    128,009.08/191,040.26 = 113,821.69/x
  3. Step 3: Cross multiply
    128,009.08x = 191,040.26 × 113,821.69
  4. Step 4: Simplify right side
    128,009.08x = 21,744,525,058.19
  5. Step 5: Solve for x
    x = 21,744,525,058.19/128,009.08
  6. Step 6: Final answer
    x = 169,867.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.