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Finding the Fourth Proportional to 131,699.95, 197,469.93 and 51,642

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Solution

The fourth proportional to 131,699.95, 197,469.93 and 51,642 is: 77,431.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,699.95 : 197,469.93 = 51,642 : x
  2. Step 2: Convert to fraction form
    131,699.95/197,469.93 = 51,642/x
  3. Step 3: Cross multiply
    131,699.95x = 197,469.93 × 51,642
  4. Step 4: Simplify right side
    131,699.95x = 10,197,742,125.06
  5. Step 5: Solve for x
    x = 10,197,742,125.06/131,699.95
  6. Step 6: Final answer
    x = 77,431.63

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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.