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Finding the Fourth Proportional to 128,776.40, 193,164.60 and 119,445.20

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Solution

The fourth proportional to 128,776.40, 193,164.60 and 119,445.20 is: 179,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,776.40 : 193,164.60 = 119,445.20 : x
  2. Step 2: Convert to fraction form
    128,776.40/193,164.60 = 119,445.20/x
  3. Step 3: Cross multiply
    128,776.40x = 193,164.60 × 119,445.20
  4. Step 4: Simplify right side
    128,776.40x = 23,072,584,279.92
  5. Step 5: Solve for x
    x = 23,072,584,279.92/128,776.40
  6. Step 6: Final answer
    x = 179,167.80

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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.