Home / 279,938,437.80-419,907,656.70-85,848,311.40

Finding the Fourth Proportional to 279,938,437.80, 419,907,656.70 and 85,848,311.40

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Solution

The fourth proportional to 279,938,437.80, 419,907,656.70 and 85,848,311.40 is: 128,772,467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,437.80 : 419,907,656.70 = 85,848,311.40 : x
  2. Step 2: Convert to fraction form
    279,938,437.80/419,907,656.70 = 85,848,311.40/x
  3. Step 3: Cross multiply
    279,938,437.80x = 419,907,656.70 × 85,848,311.40
  4. Step 4: Simplify right side
    279,938,437.80x = 36,048,363,271,625,896
  5. Step 5: Solve for x
    x = 36,048,363,271,625,896/279,938,437.80
  6. Step 6: Final answer
    x = 128,772,467.10

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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.