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Finding the Fourth Proportional to 278,776.84, 418,163.90 and 79,097.60

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Solution

The fourth proportional to 278,776.84, 418,163.90 and 79,097.60 is: 118,646.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,776.84 : 418,163.90 = 79,097.60 : x
  2. Step 2: Convert to fraction form
    278,776.84/418,163.90 = 79,097.60/x
  3. Step 3: Cross multiply
    278,776.84x = 418,163.90 × 79,097.60
  4. Step 4: Simplify right side
    278,776.84x = 33,075,760,896.64
  5. Step 5: Solve for x
    x = 33,075,760,896.64/278,776.84
  6. Step 6: Final answer
    x = 118,646.01

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1.5x scale

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.