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Finding the Fourth Proportional to 91,855.40, 137,783.10 and 87,481.40

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Solution

The fourth proportional to 91,855.40, 137,783.10 and 87,481.40 is: 131,222.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,855.40 : 137,783.10 = 87,481.40 : x
  2. Step 2: Convert to fraction form
    91,855.40/137,783.10 = 87,481.40/x
  3. Step 3: Cross multiply
    91,855.40x = 137,783.10 × 87,481.40
  4. Step 4: Simplify right side
    91,855.40x = 12,053,458,484.34
  5. Step 5: Solve for x
    x = 12,053,458,484.34/91,855.40
  6. Step 6: Final answer
    x = 131,222.10

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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.