Home / 78,230.12-117,344.80-25,639.28

Finding the Fourth Proportional to 78,230.12, 117,344.80 and 25,639.28

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Solution

The fourth proportional to 78,230.12, 117,344.80 and 25,639.28 is: 38,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,230.12 : 117,344.80 = 25,639.28 : x
  2. Step 2: Convert to fraction form
    78,230.12/117,344.80 = 25,639.28/x
  3. Step 3: Cross multiply
    78,230.12x = 117,344.80 × 25,639.28
  4. Step 4: Simplify right side
    78,230.12x = 3,008,636,183.74
  5. Step 5: Solve for x
    x = 3,008,636,183.74/78,230.12
  6. Step 6: Final answer
    x = 38,458.80

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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.