Home / 83,985.28-115,855.56-49,969.60

Finding the Fourth Proportional to 83,985.28, 115,855.56 and 49,969.60

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Solution

The fourth proportional to 83,985.28, 115,855.56 and 49,969.60 is: 68,931.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,985.28 : 115,855.56 = 49,969.60 : x
  2. Step 2: Convert to fraction form
    83,985.28/115,855.56 = 49,969.60/x
  3. Step 3: Cross multiply
    83,985.28x = 115,855.56 × 49,969.60
  4. Step 4: Simplify right side
    83,985.28x = 5,789,255,990.98
  5. Step 5: Solve for x
    x = 5,789,255,990.98/83,985.28
  6. Step 6: Final answer
    x = 68,931.79

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1.5x scale

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.