Home / 78,434.24-117,620.22-28,487.09

Finding the Fourth Proportional to 78,434.24, 117,620.22 and 28,487.09

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Solution

The fourth proportional to 78,434.24, 117,620.22 and 28,487.09 is: 42,719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,434.24 : 117,620.22 = 28,487.09 : x
  2. Step 2: Convert to fraction form
    78,434.24/117,620.22 = 28,487.09/x
  3. Step 3: Cross multiply
    78,434.24x = 117,620.22 × 28,487.09
  4. Step 4: Simplify right side
    78,434.24x = 3,350,657,792.96
  5. Step 5: Solve for x
    x = 3,350,657,792.96/78,434.24
  6. Step 6: Final answer
    x = 42,719.33

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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.