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Finding the Fourth Proportional to 70,779.33, 106,169.81 and 18,187.38

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Solution

The fourth proportional to 70,779.33, 106,169.81 and 18,187.38 is: 27,281.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.33 : 106,169.81 = 18,187.38 : x
  2. Step 2: Convert to fraction form
    70,779.33/106,169.81 = 18,187.38/x
  3. Step 3: Cross multiply
    70,779.33x = 106,169.81 × 18,187.38
  4. Step 4: Simplify right side
    70,779.33x = 1,930,950,588.06
  5. Step 5: Solve for x
    x = 1,930,950,588.06/70,779.33
  6. Step 6: Final answer
    x = 27,281.28

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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.