Home / 85,978,075.32-128,943,173.03-28,474,830.32

Finding the Fourth Proportional to 85,978,075.32, 128,943,173.03 and 28,474,830.32

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Solution

The fourth proportional to 85,978,075.32, 128,943,173.03 and 28,474,830.32 is: 42,704,316.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,978,075.32 : 128,943,173.03 = 28,474,830.32 : x
  2. Step 2: Convert to fraction form
    85,978,075.32/128,943,173.03 = 28,474,830.32/x
  3. Step 3: Cross multiply
    85,978,075.32x = 128,943,173.03 × 28,474,830.32
  4. Step 4: Simplify right side
    85,978,075.32x = 3,671,634,972,164,560.50
  5. Step 5: Solve for x
    x = 3,671,634,972,164,560.50/85,978,075.32
  6. Step 6: Final answer
    x = 42,704,316.87

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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.