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Finding the Fourth Proportional to 78,660.80, 117,991.20 and 23,256.80

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Solution

The fourth proportional to 78,660.80, 117,991.20 and 23,256.80 is: 34,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,660.80 : 117,991.20 = 23,256.80 : x
  2. Step 2: Convert to fraction form
    78,660.80/117,991.20 = 23,256.80/x
  3. Step 3: Cross multiply
    78,660.80x = 117,991.20 × 23,256.80
  4. Step 4: Simplify right side
    78,660.80x = 2,744,097,740.16
  5. Step 5: Solve for x
    x = 2,744,097,740.16/78,660.80
  6. Step 6: Final answer
    x = 34,885.20

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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.