Home / 138,829.96-191,577.78-81,461.56

Finding the Fourth Proportional to 138,829.96, 191,577.78 and 81,461.56

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Solution

The fourth proportional to 138,829.96, 191,577.78 and 81,461.56 is: 112,412.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,829.96 : 191,577.78 = 81,461.56 : x
  2. Step 2: Convert to fraction form
    138,829.96/191,577.78 = 81,461.56/x
  3. Step 3: Cross multiply
    138,829.96x = 191,577.78 × 81,461.56
  4. Step 4: Simplify right side
    138,829.96x = 15,606,224,820.14
  5. Step 5: Solve for x
    x = 15,606,224,820.14/138,829.96
  6. Step 6: Final answer
    x = 112,412.51

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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.