Home / 118,887.20-164,043.92-71,138.40

Finding the Fourth Proportional to 118,887.20, 164,043.92 and 71,138.40

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Solution

The fourth proportional to 118,887.20, 164,043.92 and 71,138.40 is: 98,158.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,887.20 : 164,043.92 = 71,138.40 : x
  2. Step 2: Convert to fraction form
    118,887.20/164,043.92 = 71,138.40/x
  3. Step 3: Cross multiply
    118,887.20x = 164,043.92 × 71,138.40
  4. Step 4: Simplify right side
    118,887.20x = 11,669,821,998.53
  5. Step 5: Solve for x
    x = 11,669,821,998.53/118,887.20
  6. Step 6: Final answer
    x = 98,158.78

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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.