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Finding the Fourth Proportional to 72,165.53, 108,235.54 and 19,579.12

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Solution

The fourth proportional to 72,165.53, 108,235.54 and 19,579.12 is: 29,365.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,165.53 : 108,235.54 = 19,579.12 : x
  2. Step 2: Convert to fraction form
    72,165.53/108,235.54 = 19,579.12/x
  3. Step 3: Cross multiply
    72,165.53x = 108,235.54 × 19,579.12
  4. Step 4: Simplify right side
    72,165.53x = 2,119,156,379.81
  5. Step 5: Solve for x
    x = 2,119,156,379.81/72,165.53
  6. Step 6: Final answer
    x = 29,365.22

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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.