Home / 113,906.08-157,160.40-78,107.20

Finding the Fourth Proportional to 113,906.08, 157,160.40 and 78,107.20

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Solution

The fourth proportional to 113,906.08, 157,160.40 and 78,107.20 is: 107,767.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,906.08 : 157,160.40 = 78,107.20 : x
  2. Step 2: Convert to fraction form
    113,906.08/157,160.40 = 78,107.20/x
  3. Step 3: Cross multiply
    113,906.08x = 157,160.40 × 78,107.20
  4. Step 4: Simplify right side
    113,906.08x = 12,275,358,794.88
  5. Step 5: Solve for x
    x = 12,275,358,794.88/113,906.08
  6. Step 6: Final answer
    x = 107,767.37

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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.