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Finding the Fourth Proportional to 78,242.92, 117,334.91 and 28,310.67

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Solution

The fourth proportional to 78,242.92, 117,334.91 and 28,310.67 is: 42,455.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,242.92 : 117,334.91 = 28,310.67 : x
  2. Step 2: Convert to fraction form
    78,242.92/117,334.91 = 28,310.67/x
  3. Step 3: Cross multiply
    78,242.92x = 117,334.91 × 28,310.67
  4. Step 4: Simplify right side
    78,242.92x = 3,321,829,987.27
  5. Step 5: Solve for x
    x = 3,321,829,987.27/78,242.92
  6. Step 6: Final answer
    x = 42,455.34

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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.