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Finding the Fourth Proportional to 118,693.28, 163,791.44 and 64,980.56

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Solution

The fourth proportional to 118,693.28, 163,791.44 and 64,980.56 is: 89,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,693.28 : 163,791.44 = 64,980.56 : x
  2. Step 2: Convert to fraction form
    118,693.28/163,791.44 = 64,980.56/x
  3. Step 3: Cross multiply
    118,693.28x = 163,791.44 × 64,980.56
  4. Step 4: Simplify right side
    118,693.28x = 10,643,259,494.41
  5. Step 5: Solve for x
    x = 10,643,259,494.41/118,693.28
  6. Step 6: Final answer
    x = 89,670.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.