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Finding the Fourth Proportional to 78,446.92, 117,720.42 and 28,522.23

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Solution

The fourth proportional to 78,446.92, 117,720.42 and 28,522.23 is: 42,801.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,446.92 : 117,720.42 = 28,522.23 : x
  2. Step 2: Convert to fraction form
    78,446.92/117,720.42 = 28,522.23/x
  3. Step 3: Cross multiply
    78,446.92x = 117,720.42 × 28,522.23
  4. Step 4: Simplify right side
    78,446.92x = 3,357,648,894.94
  5. Step 5: Solve for x
    x = 3,357,648,894.94/78,446.92
  6. Step 6: Final answer
    x = 42,801.54

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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.