Home / 149,063.40-205,712.10-81,085.32

Finding the Fourth Proportional to 149,063.40, 205,712.10 and 81,085.32

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Solution

The fourth proportional to 149,063.40, 205,712.10 and 81,085.32 is: 111,900.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,063.40 : 205,712.10 = 81,085.32 : x
  2. Step 2: Convert to fraction form
    149,063.40/205,712.10 = 81,085.32/x
  3. Step 3: Cross multiply
    149,063.40x = 205,712.10 × 81,085.32
  4. Step 4: Simplify right side
    149,063.40x = 16,680,231,456.37
  5. Step 5: Solve for x
    x = 16,680,231,456.37/149,063.40
  6. Step 6: Final answer
    x = 111,900.25

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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.