Home / 138,135.66-190,625.31-77,706.29

Finding the Fourth Proportional to 138,135.66, 190,625.31 and 77,706.29

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Solution

The fourth proportional to 138,135.66, 190,625.31 and 77,706.29 is: 107,233.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,135.66 : 190,625.31 = 77,706.29 : x
  2. Step 2: Convert to fraction form
    138,135.66/190,625.31 = 77,706.29/x
  3. Step 3: Cross multiply
    138,135.66x = 190,625.31 × 77,706.29
  4. Step 4: Simplify right side
    138,135.66x = 14,812,784,667.07
  5. Step 5: Solve for x
    x = 14,812,784,667.07/138,135.66
  6. Step 6: Final answer
    x = 107,233.60

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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.