Home / 139,095,280.80-208,642,921.20-78,629,104.80

Finding the Fourth Proportional to 139,095,280.80, 208,642,921.20 and 78,629,104.80

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Solution

The fourth proportional to 139,095,280.80, 208,642,921.20 and 78,629,104.80 is: 117,943,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,095,280.80 : 208,642,921.20 = 78,629,104.80 : x
  2. Step 2: Convert to fraction form
    139,095,280.80/208,642,921.20 = 78,629,104.80/x
  3. Step 3: Cross multiply
    139,095,280.80x = 208,642,921.20 × 78,629,104.80
  4. Step 4: Simplify right side
    139,095,280.80x = 16,405,406,116,812,940
  5. Step 5: Solve for x
    x = 16,405,406,116,812,940/139,095,280.80
  6. Step 6: Final answer
    x = 117,943,657.20

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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.