Home / 138,165.32-190,675.14-81,575.48

Finding the Fourth Proportional to 138,165.32, 190,675.14 and 81,575.48

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Solution

The fourth proportional to 138,165.32, 190,675.14 and 81,575.48 is: 112,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,165.32 : 190,675.14 = 81,575.48 : x
  2. Step 2: Convert to fraction form
    138,165.32/190,675.14 = 81,575.48/x
  3. Step 3: Cross multiply
    138,165.32x = 190,675.14 × 81,575.48
  4. Step 4: Simplify right side
    138,165.32x = 15,554,416,069.57
  5. Step 5: Solve for x
    x = 15,554,416,069.57/138,165.32
  6. Step 6: Final answer
    x = 112,578.29

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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.