Home / 117,579.12-162,170.28-81,751.20

Finding the Fourth Proportional to 117,579.12, 162,170.28 and 81,751.20

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Solution

The fourth proportional to 117,579.12, 162,170.28 and 81,751.20 is: 112,754.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,579.12 : 162,170.28 = 81,751.20 : x
  2. Step 2: Convert to fraction form
    117,579.12/162,170.28 = 81,751.20/x
  3. Step 3: Cross multiply
    117,579.12x = 162,170.28 × 81,751.20
  4. Step 4: Simplify right side
    117,579.12x = 13,257,614,994.34
  5. Step 5: Solve for x
    x = 13,257,614,994.34/117,579.12
  6. Step 6: Final answer
    x = 112,754.84

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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.