Home / 81,000.10-121,536.60-28,447.30

Finding the Fourth Proportional to 81,000.10, 121,536.60 and 28,447.30

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Solution

The fourth proportional to 81,000.10, 121,536.60 and 28,447.30 is: 42,683.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.10 : 121,536.60 = 28,447.30 : x
  2. Step 2: Convert to fraction form
    81,000.10/121,536.60 = 28,447.30/x
  3. Step 3: Cross multiply
    81,000.10x = 121,536.60 × 28,447.30
  4. Step 4: Simplify right side
    81,000.10x = 3,457,388,121.18
  5. Step 5: Solve for x
    x = 3,457,388,121.18/81,000.10
  6. Step 6: Final answer
    x = 42,683.75

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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.