Home / 80,900.28-121,405.05-28,310.22

Finding the Fourth Proportional to 80,900.28, 121,405.05 and 28,310.22

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Solution

The fourth proportional to 80,900.28, 121,405.05 and 28,310.22 is: 42,484.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,900.28 : 121,405.05 = 28,310.22 : x
  2. Step 2: Convert to fraction form
    80,900.28/121,405.05 = 28,310.22/x
  3. Step 3: Cross multiply
    80,900.28x = 121,405.05 × 28,310.22
  4. Step 4: Simplify right side
    80,900.28x = 3,437,003,674.61
  5. Step 5: Solve for x
    x = 3,437,003,674.61/80,900.28
  6. Step 6: Final answer
    x = 42,484.45

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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.