Home / 138,788.90-191,529.33-75,126.74

Finding the Fourth Proportional to 138,788.90, 191,529.33 and 75,126.74

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Solution

The fourth proportional to 138,788.90, 191,529.33 and 75,126.74 is: 103,675.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,788.90 : 191,529.33 = 75,126.74 : x
  2. Step 2: Convert to fraction form
    138,788.90/191,529.33 = 75,126.74/x
  3. Step 3: Cross multiply
    138,788.90x = 191,529.33 × 75,126.74
  4. Step 4: Simplify right side
    138,788.90x = 14,388,974,177.28
  5. Step 5: Solve for x
    x = 14,388,974,177.28/138,788.90
  6. Step 6: Final answer
    x = 103,675.25

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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.