Home / 79,128.19-109,187.22-63,036.49

Finding the Fourth Proportional to 79,128.19, 109,187.22 and 63,036.49

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Solution

The fourth proportional to 79,128.19, 109,187.22 and 63,036.49 is: 86,982.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.19 : 109,187.22 = 63,036.49 : x
  2. Step 2: Convert to fraction form
    79,128.19/109,187.22 = 63,036.49/x
  3. Step 3: Cross multiply
    79,128.19x = 109,187.22 × 63,036.49
  4. Step 4: Simplify right side
    79,128.19x = 6,882,779,101.66
  5. Step 5: Solve for x
    x = 6,882,779,101.66/79,128.19
  6. Step 6: Final answer
    x = 86,982.64

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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.