Home / 78,532.34-117,728.78-28,603.13

Finding the Fourth Proportional to 78,532.34, 117,728.78 and 28,603.13

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Solution

The fourth proportional to 78,532.34, 117,728.78 and 28,603.13 is: 42,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,532.34 : 117,728.78 = 28,603.13 : x
  2. Step 2: Convert to fraction form
    78,532.34/117,728.78 = 28,603.13/x
  3. Step 3: Cross multiply
    78,532.34x = 117,728.78 × 28,603.13
  4. Step 4: Simplify right side
    78,532.34x = 3,367,410,867.42
  5. Step 5: Solve for x
    x = 3,367,410,867.42/78,532.34
  6. Step 6: Final answer
    x = 42,879.29

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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.