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Finding the Fourth Proportional to 90,605.80, 135,908.70 and 67,277.80

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Solution

The fourth proportional to 90,605.80, 135,908.70 and 67,277.80 is: 100,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,605.80 : 135,908.70 = 67,277.80 : x
  2. Step 2: Convert to fraction form
    90,605.80/135,908.70 = 67,277.80/x
  3. Step 3: Cross multiply
    90,605.80x = 135,908.70 × 67,277.80
  4. Step 4: Simplify right side
    90,605.80x = 9,143,638,336.86
  5. Step 5: Solve for x
    x = 9,143,638,336.86/90,605.80
  6. Step 6: Final answer
    x = 100,916.70

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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.