Home / 138,541.17-191,182.99-78,111.28

Finding the Fourth Proportional to 138,541.17, 191,182.99 and 78,111.28

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Solution

The fourth proportional to 138,541.17, 191,182.99 and 78,111.28 is: 107,791.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,541.17 : 191,182.99 = 78,111.28 : x
  2. Step 2: Convert to fraction form
    138,541.17/191,182.99 = 78,111.28/x
  3. Step 3: Cross multiply
    138,541.17x = 191,182.99 × 78,111.28
  4. Step 4: Simplify right side
    138,541.17x = 14,933,548,063.13
  5. Step 5: Solve for x
    x = 14,933,548,063.13/138,541.17
  6. Step 6: Final answer
    x = 107,791.41

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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.