Home / 138,315.18-190,877.40-81,726.42

Finding the Fourth Proportional to 138,315.18, 190,877.40 and 81,726.42

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Solution

The fourth proportional to 138,315.18, 190,877.40 and 81,726.42 is: 112,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,315.18 : 190,877.40 = 81,726.42 : x
  2. Step 2: Convert to fraction form
    138,315.18/190,877.40 = 81,726.42/x
  3. Step 3: Cross multiply
    138,315.18x = 190,877.40 × 81,726.42
  4. Step 4: Simplify right side
    138,315.18x = 15,599,726,560.91
  5. Step 5: Solve for x
    x = 15,599,726,560.91/138,315.18
  6. Step 6: Final answer
    x = 112,783.91

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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.