Home / 280,629.46-420,681.75-103,088.80

Finding the Fourth Proportional to 280,629.46, 420,681.75 and 103,088.80

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Solution

The fourth proportional to 280,629.46, 420,681.75 and 103,088.80 is: 154,536.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,629.46 : 420,681.75 = 103,088.80 : x
  2. Step 2: Convert to fraction form
    280,629.46/420,681.75 = 103,088.80/x
  3. Step 3: Cross multiply
    280,629.46x = 420,681.75 × 103,088.80
  4. Step 4: Simplify right side
    280,629.46x = 43,367,577,508.54
  5. Step 5: Solve for x
    x = 43,367,577,508.54/280,629.46
  6. Step 6: Final answer
    x = 154,536.79

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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.