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Finding the Fourth Proportional to 72,318.39, 99,787.49 and 45,441.86

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Solution

The fourth proportional to 72,318.39, 99,787.49 and 45,441.86 is: 62,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,318.39 : 99,787.49 = 45,441.86 : x
  2. Step 2: Convert to fraction form
    72,318.39/99,787.49 = 45,441.86/x
  3. Step 3: Cross multiply
    72,318.39x = 99,787.49 × 45,441.86
  4. Step 4: Simplify right side
    72,318.39x = 4,534,529,150.33
  5. Step 5: Solve for x
    x = 4,534,529,150.33/72,318.39
  6. Step 6: Final answer
    x = 62,702.30

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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.