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Finding the Fourth Proportional to 127,640.40, 191,460.60 and 71,653.20

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Solution

The fourth proportional to 127,640.40, 191,460.60 and 71,653.20 is: 107,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,640.40 : 191,460.60 = 71,653.20 : x
  2. Step 2: Convert to fraction form
    127,640.40/191,460.60 = 71,653.20/x
  3. Step 3: Cross multiply
    127,640.40x = 191,460.60 × 71,653.20
  4. Step 4: Simplify right side
    127,640.40x = 13,718,764,663.92
  5. Step 5: Solve for x
    x = 13,718,764,663.92/127,640.40
  6. Step 6: Final answer
    x = 107,479.80

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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.