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Finding the Fourth Proportional to 70,679.46, 105,978.19 and 28,525.04

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Solution

The fourth proportional to 70,679.46, 105,978.19 and 28,525.04 is: 42,771.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,679.46 : 105,978.19 = 28,525.04 : x
  2. Step 2: Convert to fraction form
    70,679.46/105,978.19 = 28,525.04/x
  3. Step 3: Cross multiply
    70,679.46x = 105,978.19 × 28,525.04
  4. Step 4: Simplify right side
    70,679.46x = 3,023,032,108.88
  5. Step 5: Solve for x
    x = 3,023,032,108.88/70,679.46
  6. Step 6: Final answer
    x = 42,771.01

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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.