Home / 193,810.02-290,419-81,428.80

Finding the Fourth Proportional to 193,810.02, 290,419 and 81,428.80

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Solution

The fourth proportional to 193,810.02, 290,419 and 81,428.80 is: 122,018.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,810.02 : 290,419 = 81,428.80 : x
  2. Step 2: Convert to fraction form
    193,810.02/290,419 = 81,428.80/x
  3. Step 3: Cross multiply
    193,810.02x = 290,419 × 81,428.80
  4. Step 4: Simplify right side
    193,810.02x = 23,648,470,667.20
  5. Step 5: Solve for x
    x = 23,648,470,667.20/193,810.02
  6. Step 6: Final answer
    x = 122,018.82

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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.