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Finding the Fourth Proportional to 107,920.80, 161,735.40 and 72,280.80

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Solution

The fourth proportional to 107,920.80, 161,735.40 and 72,280.80 is: 108,323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,920.80 : 161,735.40 = 72,280.80 : x
  2. Step 2: Convert to fraction form
    107,920.80/161,735.40 = 72,280.80/x
  3. Step 3: Cross multiply
    107,920.80x = 161,735.40 × 72,280.80
  4. Step 4: Simplify right side
    107,920.80x = 11,690,364,100.32
  5. Step 5: Solve for x
    x = 11,690,364,100.32/107,920.80
  6. Step 6: Final answer
    x = 108,323.55

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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.