Home / 208,139,122.82-312,087,665.28-78,756,727.70

Finding the Fourth Proportional to 208,139,122.82, 312,087,665.28 and 78,756,727.70

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Solution

The fourth proportional to 208,139,122.82, 312,087,665.28 and 78,756,727.70 is: 118,089,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,139,122.82 : 312,087,665.28 = 78,756,727.70 : x
  2. Step 2: Convert to fraction form
    208,139,122.82/312,087,665.28 = 78,756,727.70/x
  3. Step 3: Cross multiply
    208,139,122.82x = 312,087,665.28 × 78,756,727.70
  4. Step 4: Simplify right side
    208,139,122.82x = 24,579,003,272,985,704
  5. Step 5: Solve for x
    x = 24,579,003,272,985,704/208,139,122.82
  6. Step 6: Final answer
    x = 118,089,299.79

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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.