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Finding the Fourth Proportional to 75,615.80, 113,466.90 and 28,902.20

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Solution

The fourth proportional to 75,615.80, 113,466.90 and 28,902.20 is: 43,369.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,615.80 : 113,466.90 = 28,902.20 : x
  2. Step 2: Convert to fraction form
    75,615.80/113,466.90 = 28,902.20/x
  3. Step 3: Cross multiply
    75,615.80x = 113,466.90 × 28,902.20
  4. Step 4: Simplify right side
    75,615.80x = 3,279,443,037.18
  5. Step 5: Solve for x
    x = 3,279,443,037.18/75,615.80
  6. Step 6: Final answer
    x = 43,369.81

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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.