Home / 138,089.82-190,562.15-77,660.45

Finding the Fourth Proportional to 138,089.82, 190,562.15 and 77,660.45

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Solution

The fourth proportional to 138,089.82, 190,562.15 and 77,660.45 is: 107,170.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,089.82 : 190,562.15 = 77,660.45 : x
  2. Step 2: Convert to fraction form
    138,089.82/190,562.15 = 77,660.45/x
  3. Step 3: Cross multiply
    138,089.82x = 190,562.15 × 77,660.45
  4. Step 4: Simplify right side
    138,089.82x = 14,799,142,321.97
  5. Step 5: Solve for x
    x = 14,799,142,321.97/138,089.82
  6. Step 6: Final answer
    x = 107,170.41

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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.