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Finding the Fourth Proportional to 185,709.70, 278,675.21 and 67,390.26

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Solution

The fourth proportional to 185,709.70, 278,675.21 and 67,390.26 is: 101,125.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,709.70 : 278,675.21 = 67,390.26 : x
  2. Step 2: Convert to fraction form
    185,709.70/278,675.21 = 67,390.26/x
  3. Step 3: Cross multiply
    185,709.70x = 278,675.21 × 67,390.26
  4. Step 4: Simplify right side
    185,709.70x = 18,779,994,857.45
  5. Step 5: Solve for x
    x = 18,779,994,857.45/185,709.70
  6. Step 6: Final answer
    x = 101,125.55

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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.