Home / 100,540.79-138,749.70-57,527.36

Finding the Fourth Proportional to 100,540.79, 138,749.70 and 57,527.36

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Solution

The fourth proportional to 100,540.79, 138,749.70 and 57,527.36 is: 79,389.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,540.79 : 138,749.70 = 57,527.36 : x
  2. Step 2: Convert to fraction form
    100,540.79/138,749.70 = 57,527.36/x
  3. Step 3: Cross multiply
    100,540.79x = 138,749.70 × 57,527.36
  4. Step 4: Simplify right side
    100,540.79x = 7,981,903,941.79
  5. Step 5: Solve for x
    x = 7,981,903,941.79/100,540.79
  6. Step 6: Final answer
    x = 79,389.71

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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.