Home / 130,100.78-179,488.41-81,682.12

Finding the Fourth Proportional to 130,100.78, 179,488.41 and 81,682.12

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Solution

The fourth proportional to 130,100.78, 179,488.41 and 81,682.12 is: 112,689.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,100.78 : 179,488.41 = 81,682.12 : x
  2. Step 2: Convert to fraction form
    130,100.78/179,488.41 = 81,682.12/x
  3. Step 3: Cross multiply
    130,100.78x = 179,488.41 × 81,682.12
  4. Step 4: Simplify right side
    130,100.78x = 14,660,993,762.28
  5. Step 5: Solve for x
    x = 14,660,993,762.28/130,100.78
  6. Step 6: Final answer
    x = 112,689.51

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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.