Home / 89,120.25-122,989.59-51,394.50

Finding the Fourth Proportional to 89,120.25, 122,989.59 and 51,394.50

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Solution

The fourth proportional to 89,120.25, 122,989.59 and 51,394.50 is: 70,926.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,120.25 : 122,989.59 = 51,394.50 : x
  2. Step 2: Convert to fraction form
    89,120.25/122,989.59 = 51,394.50/x
  3. Step 3: Cross multiply
    89,120.25x = 122,989.59 × 51,394.50
  4. Step 4: Simplify right side
    89,120.25x = 6,320,988,483.26
  5. Step 5: Solve for x
    x = 6,320,988,483.26/89,120.25
  6. Step 6: Final answer
    x = 70,926.51

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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.