Home / 208,139,108.82-312,087,644.34-78,756,713.70

Finding the Fourth Proportional to 208,139,108.82, 312,087,644.34 and 78,756,713.70

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Solution

The fourth proportional to 208,139,108.82, 312,087,644.34 and 78,756,713.70 is: 118,089,278.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,139,108.82 : 312,087,644.34 = 78,756,713.70 : x
  2. Step 2: Convert to fraction form
    208,139,108.82/312,087,644.34 = 78,756,713.70/x
  3. Step 3: Cross multiply
    208,139,108.82x = 312,087,644.34 × 78,756,713.70
  4. Step 4: Simplify right side
    208,139,108.82x = 24,578,997,254,592,804
  5. Step 5: Solve for x
    x = 24,578,997,254,592,804/208,139,108.82
  6. Step 6: Final answer
    x = 118,089,278.82

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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.