Home / 138,743.51-191,445.52-81,361.18

Finding the Fourth Proportional to 138,743.51, 191,445.52 and 81,361.18

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Solution

The fourth proportional to 138,743.51, 191,445.52 and 81,361.18 is: 112,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,743.51 : 191,445.52 = 81,361.18 : x
  2. Step 2: Convert to fraction form
    138,743.51/191,445.52 = 81,361.18/x
  3. Step 3: Cross multiply
    138,743.51x = 191,445.52 × 81,361.18
  4. Step 4: Simplify right side
    138,743.51x = 15,576,233,412.91
  5. Step 5: Solve for x
    x = 15,576,233,412.91/138,743.51
  6. Step 6: Final answer
    x = 112,266.39

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1.5x scale

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.