Home / 280,011.41-420,016.31-69,649.35

Finding the Fourth Proportional to 280,011.41, 420,016.31 and 69,649.35

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Solution

The fourth proportional to 280,011.41, 420,016.31 and 69,649.35 is: 104,473.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,011.41 : 420,016.31 = 69,649.35 : x
  2. Step 2: Convert to fraction form
    280,011.41/420,016.31 = 69,649.35/x
  3. Step 3: Cross multiply
    280,011.41x = 420,016.31 × 69,649.35
  4. Step 4: Simplify right side
    280,011.41x = 29,253,862,980.90
  5. Step 5: Solve for x
    x = 29,253,862,980.90/280,011.41
  6. Step 6: Final answer
    x = 104,473.82

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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.