Home / 78,057.41-117,085.89-30,639.32

Finding the Fourth Proportional to 78,057.41, 117,085.89 and 30,639.32

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Solution

The fourth proportional to 78,057.41, 117,085.89 and 30,639.32 is: 45,958.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,057.41 : 117,085.89 = 30,639.32 : x
  2. Step 2: Convert to fraction form
    78,057.41/117,085.89 = 30,639.32/x
  3. Step 3: Cross multiply
    78,057.41x = 117,085.89 × 30,639.32
  4. Step 4: Simplify right side
    78,057.41x = 3,587,431,465.77
  5. Step 5: Solve for x
    x = 3,587,431,465.77/78,057.41
  6. Step 6: Final answer
    x = 45,958.89

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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.