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Finding the Fourth Proportional to 159,040.64, 219,388.01 and 100,790.70

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Solution

The fourth proportional to 159,040.64, 219,388.01 and 100,790.70 is: 139,035.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,040.64 : 219,388.01 = 100,790.70 : x
  2. Step 2: Convert to fraction form
    159,040.64/219,388.01 = 100,790.70/x
  3. Step 3: Cross multiply
    159,040.64x = 219,388.01 × 100,790.70
  4. Step 4: Simplify right side
    159,040.64x = 22,112,270,595.55
  5. Step 5: Solve for x
    x = 22,112,270,595.55/159,040.64
  6. Step 6: Final answer
    x = 139,035.35

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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.