Home / 138,828.96-191,576.40-81,460.56

Finding the Fourth Proportional to 138,828.96, 191,576.40 and 81,460.56

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Solution

The fourth proportional to 138,828.96, 191,576.40 and 81,460.56 is: 112,411.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,828.96 : 191,576.40 = 81,460.56 : x
  2. Step 2: Convert to fraction form
    138,828.96/191,576.40 = 81,460.56/x
  3. Step 3: Cross multiply
    138,828.96x = 191,576.40 × 81,460.56
  4. Step 4: Simplify right side
    138,828.96x = 15,605,920,826.78
  5. Step 5: Solve for x
    x = 15,605,920,826.78/138,828.96
  6. Step 6: Final answer
    x = 112,411.13

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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.