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Finding the Fourth Proportional to 143,437.64, 214,959.62 and 90,752.81

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Solution

The fourth proportional to 143,437.64, 214,959.62 and 90,752.81 is: 136,004.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,437.64 : 214,959.62 = 90,752.81 : x
  2. Step 2: Convert to fraction form
    143,437.64/214,959.62 = 90,752.81/x
  3. Step 3: Cross multiply
    143,437.64x = 214,959.62 × 90,752.81
  4. Step 4: Simplify right side
    143,437.64x = 19,508,188,022.97
  5. Step 5: Solve for x
    x = 19,508,188,022.97/143,437.64
  6. Step 6: Final answer
    x = 136,004.67

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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.