Home / 149,143.79-205,822.75-81,165.15

Finding the Fourth Proportional to 149,143.79, 205,822.75 and 81,165.15

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Solution

The fourth proportional to 149,143.79, 205,822.75 and 81,165.15 is: 112,010.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,143.79 : 205,822.75 = 81,165.15 : x
  2. Step 2: Convert to fraction form
    149,143.79/205,822.75 = 81,165.15/x
  3. Step 3: Cross multiply
    149,143.79x = 205,822.75 × 81,165.15
  4. Step 4: Simplify right side
    149,143.79x = 16,705,634,377.16
  5. Step 5: Solve for x
    x = 16,705,634,377.16/149,143.79
  6. Step 6: Final answer
    x = 112,010.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.