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Finding the Fourth Proportional to 137,758.56, 190,057.92 and 90,039.45

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Solution

The fourth proportional to 137,758.56, 190,057.92 and 90,039.45 is: 124,222.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,758.56 : 190,057.92 = 90,039.45 : x
  2. Step 2: Convert to fraction form
    137,758.56/190,057.92 = 90,039.45/x
  3. Step 3: Cross multiply
    137,758.56x = 190,057.92 × 90,039.45
  4. Step 4: Simplify right side
    137,758.56x = 17,112,710,584.94
  5. Step 5: Solve for x
    x = 17,112,710,584.94/137,758.56
  6. Step 6: Final answer
    x = 124,222.48

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1.5x scale

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.