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Finding the Fourth Proportional to 133,057.89, 183,619.86 and 90,690.42

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Solution

The fourth proportional to 133,057.89, 183,619.86 and 90,690.42 is: 125,152.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,057.89 : 183,619.86 = 90,690.42 : x
  2. Step 2: Convert to fraction form
    133,057.89/183,619.86 = 90,690.42/x
  3. Step 3: Cross multiply
    133,057.89x = 183,619.86 × 90,690.42
  4. Step 4: Simplify right side
    133,057.89x = 16,652,562,223.74
  5. Step 5: Solve for x
    x = 16,652,562,223.74/133,057.89
  6. Step 6: Final answer
    x = 125,152.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.