Home / 142,090.31-196,062.28-81,649.26

Finding the Fourth Proportional to 142,090.31, 196,062.28 and 81,649.26

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Solution

The fourth proportional to 142,090.31, 196,062.28 and 81,649.26 is: 112,663.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,090.31 : 196,062.28 = 81,649.26 : x
  2. Step 2: Convert to fraction form
    142,090.31/196,062.28 = 81,649.26/x
  3. Step 3: Cross multiply
    142,090.31x = 196,062.28 × 81,649.26
  4. Step 4: Simplify right side
    142,090.31x = 16,008,339,871.79
  5. Step 5: Solve for x
    x = 16,008,339,871.79/142,090.31
  6. Step 6: Final answer
    x = 112,663.13

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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.