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Finding the Fourth Proportional to 90,486.90, 135,783.27 and 37,891.98

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Solution

The fourth proportional to 90,486.90, 135,783.27 and 37,891.98 is: 56,860.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,486.90 : 135,783.27 = 37,891.98 : x
  2. Step 2: Convert to fraction form
    90,486.90/135,783.27 = 37,891.98/x
  3. Step 3: Cross multiply
    90,486.90x = 135,783.27 × 37,891.98
  4. Step 4: Simplify right side
    90,486.90x = 5,145,096,951.17
  5. Step 5: Solve for x
    x = 5,145,096,951.17/90,486.90
  6. Step 6: Final answer
    x = 56,860.13

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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.