Home / 138,790.06-191,530.07-75,128.11

Finding the Fourth Proportional to 138,790.06, 191,530.07 and 75,128.11

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Solution

The fourth proportional to 138,790.06, 191,530.07 and 75,128.11 is: 103,676.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,790.06 : 191,530.07 = 75,128.11 : x
  2. Step 2: Convert to fraction form
    138,790.06/191,530.07 = 75,128.11/x
  3. Step 3: Cross multiply
    138,790.06x = 191,530.07 × 75,128.11
  4. Step 4: Simplify right side
    138,790.06x = 14,389,291,594.53
  5. Step 5: Solve for x
    x = 14,389,291,594.53/138,790.06
  6. Step 6: Final answer
    x = 103,676.67

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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.