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Finding the Fourth Proportional to 91,778.70, 137,668.05 and 91,778.70

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Solution

The fourth proportional to 91,778.70, 137,668.05 and 91,778.70 is: 137,668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,778.70 : 137,668.05 = 91,778.70 : x
  2. Step 2: Convert to fraction form
    91,778.70/137,668.05 = 91,778.70/x
  3. Step 3: Cross multiply
    91,778.70x = 137,668.05 × 91,778.70
  4. Step 4: Simplify right side
    91,778.70x = 12,634,994,660.54
  5. Step 5: Solve for x
    x = 12,634,994,660.54/91,778.70
  6. Step 6: Final answer
    x = 137,668.05

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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.