Home / 208,075,428.80-312,018,664.80-78,640,020.80

Finding the Fourth Proportional to 208,075,428.80, 312,018,664.80 and 78,640,020.80

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Solution

The fourth proportional to 208,075,428.80, 312,018,664.80 and 78,640,020.80 is: 117,924,324.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,075,428.80 : 312,018,664.80 = 78,640,020.80 : x
  2. Step 2: Convert to fraction form
    208,075,428.80/312,018,664.80 = 78,640,020.80/x
  3. Step 3: Cross multiply
    208,075,428.80x = 312,018,664.80 × 78,640,020.80
  4. Step 4: Simplify right side
    208,075,428.80x = 24,537,154,289,860,228
  5. Step 5: Solve for x
    x = 24,537,154,289,860,228/208,075,428.80
  6. Step 6: Final answer
    x = 117,924,324.04

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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.