Home / 138,530.24-191,126.72-84,759.20

Finding the Fourth Proportional to 138,530.24, 191,126.72 and 84,759.20

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Solution

The fourth proportional to 138,530.24, 191,126.72 and 84,759.20 is: 116,940.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,530.24 : 191,126.72 = 84,759.20 : x
  2. Step 2: Convert to fraction form
    138,530.24/191,126.72 = 84,759.20/x
  3. Step 3: Cross multiply
    138,530.24x = 191,126.72 × 84,759.20
  4. Step 4: Simplify right side
    138,530.24x = 16,199,747,885.82
  5. Step 5: Solve for x
    x = 16,199,747,885.82/138,530.24
  6. Step 6: Final answer
    x = 116,940.16

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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.