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Finding the Fourth Proportional to 90,383.80, 135,575.70 and 67,055.80

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Solution

The fourth proportional to 90,383.80, 135,575.70 and 67,055.80 is: 100,583.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,383.80 : 135,575.70 = 67,055.80 : x
  2. Step 2: Convert to fraction form
    90,383.80/135,575.70 = 67,055.80/x
  3. Step 3: Cross multiply
    90,383.80x = 135,575.70 × 67,055.80
  4. Step 4: Simplify right side
    90,383.80x = 9,091,137,024.06
  5. Step 5: Solve for x
    x = 9,091,137,024.06/90,383.80
  6. Step 6: Final answer
    x = 100,583.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.