Home / 138,669.03-191,352.38-78,254.37

Finding the Fourth Proportional to 138,669.03, 191,352.38 and 78,254.37

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Solution

The fourth proportional to 138,669.03, 191,352.38 and 78,254.37 is: 107,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,669.03 : 191,352.38 = 78,254.37 : x
  2. Step 2: Convert to fraction form
    138,669.03/191,352.38 = 78,254.37/x
  3. Step 3: Cross multiply
    138,669.03x = 191,352.38 × 78,254.37
  4. Step 4: Simplify right side
    138,669.03x = 14,974,159,553.63
  5. Step 5: Solve for x
    x = 14,974,159,553.63/138,669.03
  6. Step 6: Final answer
    x = 107,984.89

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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.