Home / 78,412,305.80-117,618,458.70-74,885,112.20

Finding the Fourth Proportional to 78,412,305.80, 117,618,458.70 and 74,885,112.20

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Solution

The fourth proportional to 78,412,305.80, 117,618,458.70 and 74,885,112.20 is: 112,327,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,412,305.80 : 117,618,458.70 = 74,885,112.20 : x
  2. Step 2: Convert to fraction form
    78,412,305.80/117,618,458.70 = 74,885,112.20/x
  3. Step 3: Cross multiply
    78,412,305.80x = 117,618,458.70 × 74,885,112.20
  4. Step 4: Simplify right side
    78,412,305.80x = 8,807,871,476,540,567
  5. Step 5: Solve for x
    x = 8,807,871,476,540,567/78,412,305.80
  6. Step 6: Final answer
    x = 112,327,668.30

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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.