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Finding the Fourth Proportional to 70,978.87, 106,482.99 and 28,858.95

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Solution

The fourth proportional to 70,978.87, 106,482.99 and 28,858.95 is: 43,294.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,978.87 : 106,482.99 = 28,858.95 : x
  2. Step 2: Convert to fraction form
    70,978.87/106,482.99 = 28,858.95/x
  3. Step 3: Cross multiply
    70,978.87x = 106,482.99 × 28,858.95
  4. Step 4: Simplify right side
    70,978.87x = 3,072,987,284.26
  5. Step 5: Solve for x
    x = 3,072,987,284.26/70,978.87
  6. Step 6: Final answer
    x = 43,294.40

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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.