Home / 138,450.26-191,065.37-78,017.58

Finding the Fourth Proportional to 138,450.26, 191,065.37 and 78,017.58

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Solution

The fourth proportional to 138,450.26, 191,065.37 and 78,017.58 is: 107,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,450.26 : 191,065.37 = 78,017.58 : x
  2. Step 2: Convert to fraction form
    138,450.26/191,065.37 = 78,017.58/x
  3. Step 3: Cross multiply
    138,450.26x = 191,065.37 × 78,017.58
  4. Step 4: Simplify right side
    138,450.26x = 14,906,457,399.12
  5. Step 5: Solve for x
    x = 14,906,457,399.12/138,450.26
  6. Step 6: Final answer
    x = 107,666.52

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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.