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Finding the Fourth Proportional to 107,886.40, 161,743.20 and 45,505.60

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Solution

The fourth proportional to 107,886.40, 161,743.20 and 45,505.60 is: 68,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,886.40 : 161,743.20 = 45,505.60 : x
  2. Step 2: Convert to fraction form
    107,886.40/161,743.20 = 45,505.60/x
  3. Step 3: Cross multiply
    107,886.40x = 161,743.20 × 45,505.60
  4. Step 4: Simplify right side
    107,886.40x = 7,360,221,361.92
  5. Step 5: Solve for x
    x = 7,360,221,361.92/107,886.40
  6. Step 6: Final answer
    x = 68,221.96

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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.