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Finding the Fourth Proportional to 98,296.88, 135,648.45 and 55,283.49

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Solution

The fourth proportional to 98,296.88, 135,648.45 and 55,283.49 is: 76,290.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,296.88 : 135,648.45 = 55,283.49 : x
  2. Step 2: Convert to fraction form
    98,296.88/135,648.45 = 55,283.49/x
  3. Step 3: Cross multiply
    98,296.88x = 135,648.45 × 55,283.49
  4. Step 4: Simplify right side
    98,296.88x = 7,499,119,192.09
  5. Step 5: Solve for x
    x = 7,499,119,192.09/98,296.88
  6. Step 6: Final answer
    x = 76,290.51

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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.