Home / 78,447.42-117,665.73-45,142.92

Finding the Fourth Proportional to 78,447.42, 117,665.73 and 45,142.92

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Solution

The fourth proportional to 78,447.42, 117,665.73 and 45,142.92 is: 67,711.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,447.42 : 117,665.73 = 45,142.92 : x
  2. Step 2: Convert to fraction form
    78,447.42/117,665.73 = 45,142.92/x
  3. Step 3: Cross multiply
    78,447.42x = 117,665.73 × 45,142.92
  4. Step 4: Simplify right side
    78,447.42x = 5,311,774,636.13
  5. Step 5: Solve for x
    x = 5,311,774,636.13/78,447.42
  6. Step 6: Final answer
    x = 67,711.27

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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.