Home / 138,165.36-190,666.08-80,817.36

Finding the Fourth Proportional to 138,165.36, 190,666.08 and 80,817.36

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Solution

The fourth proportional to 138,165.36, 190,666.08 and 80,817.36 is: 111,526.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,165.36 : 190,666.08 = 80,817.36 : x
  2. Step 2: Convert to fraction form
    138,165.36/190,666.08 = 80,817.36/x
  3. Step 3: Cross multiply
    138,165.36x = 190,666.08 × 80,817.36
  4. Step 4: Simplify right side
    138,165.36x = 15,409,129,227.15
  5. Step 5: Solve for x
    x = 15,409,129,227.15/138,165.36
  6. Step 6: Final answer
    x = 111,526.72

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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.