Home / 80,905.40-121,271.70-30,966.20

Finding the Fourth Proportional to 80,905.40, 121,271.70 and 30,966.20

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Solution

The fourth proportional to 80,905.40, 121,271.70 and 30,966.20 is: 46,416.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.40 : 121,271.70 = 30,966.20 : x
  2. Step 2: Convert to fraction form
    80,905.40/121,271.70 = 30,966.20/x
  3. Step 3: Cross multiply
    80,905.40x = 121,271.70 × 30,966.20
  4. Step 4: Simplify right side
    80,905.40x = 3,755,323,716.54
  5. Step 5: Solve for x
    x = 3,755,323,716.54/80,905.40
  6. Step 6: Final answer
    x = 46,416.23

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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.