Home / 280,191.51-420,242.16-80,466.47

Finding the Fourth Proportional to 280,191.51, 420,242.16 and 80,466.47

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Solution

The fourth proportional to 280,191.51, 420,242.16 and 80,466.47 is: 120,686.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,191.51 : 420,242.16 = 80,466.47 : x
  2. Step 2: Convert to fraction form
    280,191.51/420,242.16 = 80,466.47/x
  3. Step 3: Cross multiply
    280,191.51x = 420,242.16 × 80,466.47
  4. Step 4: Simplify right side
    280,191.51x = 33,815,403,909.23
  5. Step 5: Solve for x
    x = 33,815,403,909.23/280,191.51
  6. Step 6: Final answer
    x = 120,686.75

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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.