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Finding the Fourth Proportional to 118,661.20, 178,164.60 and 72,005.20

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Solution

The fourth proportional to 118,661.20, 178,164.60 and 72,005.20 is: 108,112.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,661.20 : 178,164.60 = 72,005.20 : x
  2. Step 2: Convert to fraction form
    118,661.20/178,164.60 = 72,005.20/x
  3. Step 3: Cross multiply
    118,661.20x = 178,164.60 × 72,005.20
  4. Step 4: Simplify right side
    118,661.20x = 12,828,777,655.92
  5. Step 5: Solve for x
    x = 12,828,777,655.92/118,661.20
  6. Step 6: Final answer
    x = 108,112.66

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1.5x scale

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.