Home / 208,075,019.80-312,018,051.30-78,639,611.80

Finding the Fourth Proportional to 208,075,019.80, 312,018,051.30 and 78,639,611.80

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Solution

The fourth proportional to 208,075,019.80, 312,018,051.30 and 78,639,611.80 is: 117,923,710.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,075,019.80 : 312,018,051.30 = 78,639,611.80 : x
  2. Step 2: Convert to fraction form
    208,075,019.80/312,018,051.30 = 78,639,611.80/x
  3. Step 3: Cross multiply
    208,075,019.80x = 312,018,051.30 × 78,639,611.80
  4. Step 4: Simplify right side
    208,075,019.80x = 24,536,978,428,824,484
  5. Step 5: Solve for x
    x = 24,536,978,428,824,484/208,075,019.80
  6. Step 6: Final answer
    x = 117,923,710.65

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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.