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Finding the Fourth Proportional to 91,818.70, 137,728.05 and 87,930.70

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Solution

The fourth proportional to 91,818.70, 137,728.05 and 87,930.70 is: 131,896.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,818.70 : 137,728.05 = 87,930.70 : x
  2. Step 2: Convert to fraction form
    91,818.70/137,728.05 = 87,930.70/x
  3. Step 3: Cross multiply
    91,818.70x = 137,728.05 × 87,930.70
  4. Step 4: Simplify right side
    91,818.70x = 12,110,523,846.14
  5. Step 5: Solve for x
    x = 12,110,523,846.14/91,818.70
  6. Step 6: Final answer
    x = 131,896.05

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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.