Home / 149,015.40-205,625.70-85,355.88

Finding the Fourth Proportional to 149,015.40, 205,625.70 and 85,355.88

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Solution

The fourth proportional to 149,015.40, 205,625.70 and 85,355.88 is: 117,782.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,015.40 : 205,625.70 = 85,355.88 : x
  2. Step 2: Convert to fraction form
    149,015.40/205,625.70 = 85,355.88/x
  3. Step 3: Cross multiply
    149,015.40x = 205,625.70 × 85,355.88
  4. Step 4: Simplify right side
    149,015.40x = 17,551,362,574.12
  5. Step 5: Solve for x
    x = 17,551,362,574.12/149,015.40
  6. Step 6: Final answer
    x = 117,782.21

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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.