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Finding the Fourth Proportional to 54,661.12, 75,430.84 and 30,787.32

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Solution

The fourth proportional to 54,661.12, 75,430.84 and 30,787.32 is: 42,485.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,661.12 : 75,430.84 = 30,787.32 : x
  2. Step 2: Convert to fraction form
    54,661.12/75,430.84 = 30,787.32/x
  3. Step 3: Cross multiply
    54,661.12x = 75,430.84 × 30,787.32
  4. Step 4: Simplify right side
    54,661.12x = 2,322,313,408.95
  5. Step 5: Solve for x
    x = 2,322,313,408.95/54,661.12
  6. Step 6: Final answer
    x = 42,485.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.