Home / 117,983.78-162,813.01-72,120.20

Finding the Fourth Proportional to 117,983.78, 162,813.01 and 72,120.20

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Solution

The fourth proportional to 117,983.78, 162,813.01 and 72,120.20 is: 99,523.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,983.78 : 162,813.01 = 72,120.20 : x
  2. Step 2: Convert to fraction form
    117,983.78/162,813.01 = 72,120.20/x
  3. Step 3: Cross multiply
    117,983.78x = 162,813.01 × 72,120.20
  4. Step 4: Simplify right side
    117,983.78x = 11,742,106,843.80
  5. Step 5: Solve for x
    x = 11,742,106,843.80/117,983.78
  6. Step 6: Final answer
    x = 99,523.06

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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.