Home / 118,884.20-164,039.78-71,135.40

Finding the Fourth Proportional to 118,884.20, 164,039.78 and 71,135.40

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Solution

The fourth proportional to 118,884.20, 164,039.78 and 71,135.40 is: 98,154.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,884.20 : 164,039.78 = 71,135.40 : x
  2. Step 2: Convert to fraction form
    118,884.20/164,039.78 = 71,135.40/x
  3. Step 3: Cross multiply
    118,884.20x = 164,039.78 × 71,135.40
  4. Step 4: Simplify right side
    118,884.20x = 11,669,035,366.21
  5. Step 5: Solve for x
    x = 11,669,035,366.21/118,884.20
  6. Step 6: Final answer
    x = 98,154.64

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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.