Home / 90,018.70-135,112.84-45,677.28

Finding the Fourth Proportional to 90,018.70, 135,112.84 and 45,677.28

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Solution

The fourth proportional to 90,018.70, 135,112.84 and 45,677.28 is: 68,558.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,018.70 : 135,112.84 = 45,677.28 : x
  2. Step 2: Convert to fraction form
    90,018.70/135,112.84 = 45,677.28/x
  3. Step 3: Cross multiply
    90,018.70x = 135,112.84 × 45,677.28
  4. Step 4: Simplify right side
    90,018.70x = 6,171,587,024.28
  5. Step 5: Solve for x
    x = 6,171,587,024.28/90,018.70
  6. Step 6: Final answer
    x = 68,558.94

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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.