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Finding the Fourth Proportional to 72,158.58, 99,578.58 and 40,327.44

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Solution

The fourth proportional to 72,158.58, 99,578.58 and 40,327.44 is: 55,651.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,158.58 : 99,578.58 = 40,327.44 : x
  2. Step 2: Convert to fraction form
    72,158.58/99,578.58 = 40,327.44/x
  3. Step 3: Cross multiply
    72,158.58x = 99,578.58 × 40,327.44
  4. Step 4: Simplify right side
    72,158.58x = 4,015,749,210.24
  5. Step 5: Solve for x
    x = 4,015,749,210.24/72,158.58
  6. Step 6: Final answer
    x = 55,651.72

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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.