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Finding the Fourth Proportional to 79,286.40, 118,929.60 and 75,787.20

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Solution

The fourth proportional to 79,286.40, 118,929.60 and 75,787.20 is: 113,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,286.40 : 118,929.60 = 75,787.20 : x
  2. Step 2: Convert to fraction form
    79,286.40/118,929.60 = 75,787.20/x
  3. Step 3: Cross multiply
    79,286.40x = 118,929.60 × 75,787.20
  4. Step 4: Simplify right side
    79,286.40x = 9,013,341,381.12
  5. Step 5: Solve for x
    x = 9,013,341,381.12/79,286.40
  6. Step 6: Final answer
    x = 113,680.80

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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.