Home / 78,215.23-117,322.17-28,276.48

Finding the Fourth Proportional to 78,215.23, 117,322.17 and 28,276.48

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Solution

The fourth proportional to 78,215.23, 117,322.17 and 28,276.48 is: 42,414.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,215.23 : 117,322.17 = 28,276.48 : x
  2. Step 2: Convert to fraction form
    78,215.23/117,322.17 = 28,276.48/x
  3. Step 3: Cross multiply
    78,215.23x = 117,322.17 × 28,276.48
  4. Step 4: Simplify right side
    78,215.23x = 3,317,457,993.56
  5. Step 5: Solve for x
    x = 3,317,457,993.56/78,215.23
  6. Step 6: Final answer
    x = 42,414.48

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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.