Home / 138,135.85-190,626.09-76,881.02

Finding the Fourth Proportional to 138,135.85, 190,626.09 and 76,881.02

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Solution

The fourth proportional to 138,135.85, 190,626.09 and 76,881.02 is: 106,095.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,135.85 : 190,626.09 = 76,881.02 : x
  2. Step 2: Convert to fraction form
    138,135.85/190,626.09 = 76,881.02/x
  3. Step 3: Cross multiply
    138,135.85x = 190,626.09 × 76,881.02
  4. Step 4: Simplify right side
    138,135.85x = 14,655,528,237.81
  5. Step 5: Solve for x
    x = 14,655,528,237.81/138,135.85
  6. Step 6: Final answer
    x = 106,095.04

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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.