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Finding the Fourth Proportional to 75,645.60, 113,468.40 and 28,892.40

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Solution

The fourth proportional to 75,645.60, 113,468.40 and 28,892.40 is: 43,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,645.60 : 113,468.40 = 28,892.40 : x
  2. Step 2: Convert to fraction form
    75,645.60/113,468.40 = 28,892.40/x
  3. Step 3: Cross multiply
    75,645.60x = 113,468.40 × 28,892.40
  4. Step 4: Simplify right side
    75,645.60x = 3,278,374,400.16
  5. Step 5: Solve for x
    x = 3,278,374,400.16/75,645.60
  6. Step 6: Final answer
    x = 43,338.60

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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.