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Finding the Fourth Proportional to 75,506.40, 113,187.60 and 28,108.80

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Solution

The fourth proportional to 75,506.40, 113,187.60 and 28,108.80 is: 42,136.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,506.40 : 113,187.60 = 28,108.80 : x
  2. Step 2: Convert to fraction form
    75,506.40/113,187.60 = 28,108.80/x
  3. Step 3: Cross multiply
    75,506.40x = 113,187.60 × 28,108.80
  4. Step 4: Simplify right side
    75,506.40x = 3,181,567,610.88
  5. Step 5: Solve for x
    x = 3,181,567,610.88/75,506.40
  6. Step 6: Final answer
    x = 42,136.40

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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.