Home / 83,785.06-115,504.40-66,638.98

Finding the Fourth Proportional to 83,785.06, 115,504.40 and 66,638.98

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Solution

The fourth proportional to 83,785.06, 115,504.40 and 66,638.98 is: 91,867.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,785.06 : 115,504.40 = 66,638.98 : x
  2. Step 2: Convert to fraction form
    83,785.06/115,504.40 = 66,638.98/x
  3. Step 3: Cross multiply
    83,785.06x = 115,504.40 × 66,638.98
  4. Step 4: Simplify right side
    83,785.06x = 7,697,095,401.51
  5. Step 5: Solve for x
    x = 7,697,095,401.51/83,785.06
  6. Step 6: Final answer
    x = 91,867.16

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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.