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Finding the Fourth Proportional to 107,968.40, 161,758.20 and 66,366.80

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Solution

The fourth proportional to 107,968.40, 161,758.20 and 66,366.80 is: 99,430.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,968.40 : 161,758.20 = 66,366.80 : x
  2. Step 2: Convert to fraction form
    107,968.40/161,758.20 = 66,366.80/x
  3. Step 3: Cross multiply
    107,968.40x = 161,758.20 × 66,366.80
  4. Step 4: Simplify right side
    107,968.40x = 10,735,374,107.76
  5. Step 5: Solve for x
    x = 10,735,374,107.76/107,968.40
  6. Step 6: Final answer
    x = 99,430.70

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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.