Home / 78,003,199.80-117,004,799.70-39,739,447.80

Finding the Fourth Proportional to 78,003,199.80, 117,004,799.70 and 39,739,447.80

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Solution

The fourth proportional to 78,003,199.80, 117,004,799.70 and 39,739,447.80 is: 59,609,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,199.80 : 117,004,799.70 = 39,739,447.80 : x
  2. Step 2: Convert to fraction form
    78,003,199.80/117,004,799.70 = 39,739,447.80/x
  3. Step 3: Cross multiply
    78,003,199.80x = 117,004,799.70 × 39,739,447.80
  4. Step 4: Simplify right side
    78,003,199.80x = 4,649,706,130,027,605
  5. Step 5: Solve for x
    x = 4,649,706,130,027,605/78,003,199.80
  6. Step 6: Final answer
    x = 59,609,171.70

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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.