Home / 138,132.27-190,639.41-77,705.46

Finding the Fourth Proportional to 138,132.27, 190,639.41 and 77,705.46

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Solution

The fourth proportional to 138,132.27, 190,639.41 and 77,705.46 is: 107,243.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,132.27 : 190,639.41 = 77,705.46 : x
  2. Step 2: Convert to fraction form
    138,132.27/190,639.41 = 77,705.46/x
  3. Step 3: Cross multiply
    138,132.27x = 190,639.41 × 77,705.46
  4. Step 4: Simplify right side
    138,132.27x = 14,813,723,048.18
  5. Step 5: Solve for x
    x = 14,813,723,048.18/138,132.27
  6. Step 6: Final answer
    x = 107,243.03

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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.