Home / 80,675.10-121,012.65-28,047.60

Finding the Fourth Proportional to 80,675.10, 121,012.65 and 28,047.60

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Solution

The fourth proportional to 80,675.10, 121,012.65 and 28,047.60 is: 42,071.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,675.10 : 121,012.65 = 28,047.60 : x
  2. Step 2: Convert to fraction form
    80,675.10/121,012.65 = 28,047.60/x
  3. Step 3: Cross multiply
    80,675.10x = 121,012.65 × 28,047.60
  4. Step 4: Simplify right side
    80,675.10x = 3,394,114,402.14
  5. Step 5: Solve for x
    x = 3,394,114,402.14/80,675.10
  6. Step 6: Final answer
    x = 42,071.40

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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.