Home / 79,123.19-109,190.19-43,315.51

Finding the Fourth Proportional to 79,123.19, 109,190.19 and 43,315.51

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Solution

The fourth proportional to 79,123.19, 109,190.19 and 43,315.51 is: 59,775.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,123.19 : 109,190.19 = 43,315.51 : x
  2. Step 2: Convert to fraction form
    79,123.19/109,190.19 = 43,315.51/x
  3. Step 3: Cross multiply
    79,123.19x = 109,190.19 × 43,315.51
  4. Step 4: Simplify right side
    79,123.19x = 4,729,628,678.30
  5. Step 5: Solve for x
    x = 4,729,628,678.30/79,123.19
  6. Step 6: Final answer
    x = 59,775.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.