Home / 81,450.40-112,385.48-51,218.16

Finding the Fourth Proportional to 81,450.40, 112,385.48 and 51,218.16

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Solution

The fourth proportional to 81,450.40, 112,385.48 and 51,218.16 is: 70,670.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.40 : 112,385.48 = 51,218.16 : x
  2. Step 2: Convert to fraction form
    81,450.40/112,385.48 = 51,218.16/x
  3. Step 3: Cross multiply
    81,450.40x = 112,385.48 × 51,218.16
  4. Step 4: Simplify right side
    81,450.40x = 5,756,177,496.32
  5. Step 5: Solve for x
    x = 5,756,177,496.32/81,450.40
  6. Step 6: Final answer
    x = 70,670.95

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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.