Home / 80,988.28-121,483.50-28,399.30

Finding the Fourth Proportional to 80,988.28, 121,483.50 and 28,399.30

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Solution

The fourth proportional to 80,988.28, 121,483.50 and 28,399.30 is: 42,599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,988.28 : 121,483.50 = 28,399.30 : x
  2. Step 2: Convert to fraction form
    80,988.28/121,483.50 = 28,399.30/x
  3. Step 3: Cross multiply
    80,988.28x = 121,483.50 × 28,399.30
  4. Step 4: Simplify right side
    80,988.28x = 3,450,046,361.55
  5. Step 5: Solve for x
    x = 3,450,046,361.55/80,988.28
  6. Step 6: Final answer
    x = 42,599.33

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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.