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Finding the Fourth Proportional to 90,505.90, 135,811.78 and 37,910.98

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Solution

The fourth proportional to 90,505.90, 135,811.78 and 37,910.98 is: 56,888.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,505.90 : 135,811.78 = 37,910.98 : x
  2. Step 2: Convert to fraction form
    90,505.90/135,811.78 = 37,910.98/x
  3. Step 3: Cross multiply
    90,505.90x = 135,811.78 × 37,910.98
  4. Step 4: Simplify right side
    90,505.90x = 5,148,757,675.34
  5. Step 5: Solve for x
    x = 5,148,757,675.34/90,505.90
  6. Step 6: Final answer
    x = 56,888.64

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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.