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Finding the Fourth Proportional to 127,170, 190,670.76 and 60,620.40

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Solution

The fourth proportional to 127,170, 190,670.76 and 60,620.40 is: 90,890.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,170 : 190,670.76 = 60,620.40 : x
  2. Step 2: Convert to fraction form
    127,170/190,670.76 = 60,620.40/x
  3. Step 3: Cross multiply
    127,170x = 190,670.76 × 60,620.40
  4. Step 4: Simplify right side
    127,170x = 11,558,537,739.50
  5. Step 5: Solve for x
    x = 11,558,537,739.50/127,170
  6. Step 6: Final answer
    x = 90,890.44

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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.