Home / 80,918.19-121,431.96-28,328.13

Finding the Fourth Proportional to 80,918.19, 121,431.96 and 28,328.13

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Solution

The fourth proportional to 80,918.19, 121,431.96 and 28,328.13 is: 42,511.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,918.19 : 121,431.96 = 28,328.13 : x
  2. Step 2: Convert to fraction form
    80,918.19/121,431.96 = 28,328.13/x
  3. Step 3: Cross multiply
    80,918.19x = 121,431.96 × 28,328.13
  4. Step 4: Simplify right side
    80,918.19x = 3,439,940,349.03
  5. Step 5: Solve for x
    x = 3,439,940,349.03/80,918.19
  6. Step 6: Final answer
    x = 42,511.34

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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.