Home / 138,023.87-190,480.43-76,776.53

Finding the Fourth Proportional to 138,023.87, 190,480.43 and 76,776.53

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Solution

The fourth proportional to 138,023.87, 190,480.43 and 76,776.53 is: 105,955.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,023.87 : 190,480.43 = 76,776.53 : x
  2. Step 2: Convert to fraction form
    138,023.87/190,480.43 = 76,776.53/x
  3. Step 3: Cross multiply
    138,023.87x = 190,480.43 × 76,776.53
  4. Step 4: Simplify right side
    138,023.87x = 14,624,425,687.85
  5. Step 5: Solve for x
    x = 14,624,425,687.85/138,023.87
  6. Step 6: Final answer
    x = 105,955.78

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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.