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Finding the Fourth Proportional to 138,434.40, 191,047.41 and 84,704.40

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Solution

The fourth proportional to 138,434.40, 191,047.41 and 84,704.40 is: 116,896.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,434.40 : 191,047.41 = 84,704.40 : x
  2. Step 2: Convert to fraction form
    138,434.40/191,047.41 = 84,704.40/x
  3. Step 3: Cross multiply
    138,434.40x = 191,047.41 × 84,704.40
  4. Step 4: Simplify right side
    138,434.40x = 16,182,556,235.60
  5. Step 5: Solve for x
    x = 16,182,556,235.60/138,434.40
  6. Step 6: Final answer
    x = 116,896.93

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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.