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Finding the Fourth Proportional to 75,720.88, 113,584.56 and 28,331.56

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Solution

The fourth proportional to 75,720.88, 113,584.56 and 28,331.56 is: 42,498.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,720.88 : 113,584.56 = 28,331.56 : x
  2. Step 2: Convert to fraction form
    75,720.88/113,584.56 = 28,331.56/x
  3. Step 3: Cross multiply
    75,720.88x = 113,584.56 × 28,331.56
  4. Step 4: Simplify right side
    75,720.88x = 3,218,027,776.71
  5. Step 5: Solve for x
    x = 3,218,027,776.71/75,720.88
  6. Step 6: Final answer
    x = 42,498.55

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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.