Home / 118,781.79-178,205.49-105,725.40

Finding the Fourth Proportional to 118,781.79, 178,205.49 and 105,725.40

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Solution

The fourth proportional to 118,781.79, 178,205.49 and 105,725.40 is: 158,617.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,781.79 : 178,205.49 = 105,725.40 : x
  2. Step 2: Convert to fraction form
    118,781.79/178,205.49 = 105,725.40/x
  3. Step 3: Cross multiply
    118,781.79x = 178,205.49 × 105,725.40
  4. Step 4: Simplify right side
    118,781.79x = 18,840,846,712.45
  5. Step 5: Solve for x
    x = 18,840,846,712.45/118,781.79
  6. Step 6: Final answer
    x = 158,617.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.