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Finding the Fourth Proportional to 90,606.89, 135,795.51 and 51,186.21

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Solution

The fourth proportional to 90,606.89, 135,795.51 and 51,186.21 is: 76,714.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,606.89 : 135,795.51 = 51,186.21 : x
  2. Step 2: Convert to fraction form
    90,606.89/135,795.51 = 51,186.21/x
  3. Step 3: Cross multiply
    90,606.89x = 135,795.51 × 51,186.21
  4. Step 4: Simplify right side
    90,606.89x = 6,950,857,491.92
  5. Step 5: Solve for x
    x = 6,950,857,491.92/90,606.89
  6. Step 6: Final answer
    x = 76,714.45

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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.