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Finding the Fourth Proportional to 138,555.36, 191,205.36 and 108,371.52

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Solution

The fourth proportional to 138,555.36, 191,205.36 and 108,371.52 is: 149,551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,555.36 : 191,205.36 = 108,371.52 : x
  2. Step 2: Convert to fraction form
    138,555.36/191,205.36 = 108,371.52/x
  3. Step 3: Cross multiply
    138,555.36x = 191,205.36 × 108,371.52
  4. Step 4: Simplify right side
    138,555.36x = 20,721,215,495.35
  5. Step 5: Solve for x
    x = 20,721,215,495.35/138,555.36
  6. Step 6: Final answer
    x = 149,551.89

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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.