Home / 138,742.96-191,465.22-78,326.14

Finding the Fourth Proportional to 138,742.96, 191,465.22 and 78,326.14

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Solution

The fourth proportional to 138,742.96, 191,465.22 and 78,326.14 is: 108,090.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.96 : 191,465.22 = 78,326.14 : x
  2. Step 2: Convert to fraction form
    138,742.96/191,465.22 = 78,326.14/x
  3. Step 3: Cross multiply
    138,742.96x = 191,465.22 × 78,326.14
  4. Step 4: Simplify right side
    138,742.96x = 14,996,731,626.85
  5. Step 5: Solve for x
    x = 14,996,731,626.85/138,742.96
  6. Step 6: Final answer
    x = 108,090.04

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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.