Home / 139,296,799.80-208,945,199.70-78,830,623.80

Finding the Fourth Proportional to 139,296,799.80, 208,945,199.70 and 78,830,623.80

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Solution

The fourth proportional to 139,296,799.80, 208,945,199.70 and 78,830,623.80 is: 118,245,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,296,799.80 : 208,945,199.70 = 78,830,623.80 : x
  2. Step 2: Convert to fraction form
    139,296,799.80/208,945,199.70 = 78,830,623.80/x
  3. Step 3: Cross multiply
    139,296,799.80x = 208,945,199.70 × 78,830,623.80
  4. Step 4: Simplify right side
    139,296,799.80x = 16,471,280,432,366,572
  5. Step 5: Solve for x
    x = 16,471,280,432,366,572/139,296,799.80
  6. Step 6: Final answer
    x = 118,245,935.70

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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.