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Finding the Fourth Proportional to 81,152.80, 121,729.20 and 46,160.80

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Solution

The fourth proportional to 81,152.80, 121,729.20 and 46,160.80 is: 69,241.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,152.80 : 121,729.20 = 46,160.80 : x
  2. Step 2: Convert to fraction form
    81,152.80/121,729.20 = 46,160.80/x
  3. Step 3: Cross multiply
    81,152.80x = 121,729.20 × 46,160.80
  4. Step 4: Simplify right side
    81,152.80x = 5,619,117,255.36
  5. Step 5: Solve for x
    x = 5,619,117,255.36/81,152.80
  6. Step 6: Final answer
    x = 69,241.20

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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.