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Finding the Fourth Proportional to 127,939.20, 178,881.60 and 127,939.20

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Solution

The fourth proportional to 127,939.20, 178,881.60 and 127,939.20 is: 178,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,939.20 : 178,881.60 = 127,939.20 : x
  2. Step 2: Convert to fraction form
    127,939.20/178,881.60 = 127,939.20/x
  3. Step 3: Cross multiply
    127,939.20x = 178,881.60 × 127,939.20
  4. Step 4: Simplify right side
    127,939.20x = 22,885,968,798.72
  5. Step 5: Solve for x
    x = 22,885,968,798.72/127,939.20
  6. Step 6: Final answer
    x = 178,881.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.