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Finding the Fourth Proportional to 72,643.54, 108,965.15 and 19,335.53

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Solution

The fourth proportional to 72,643.54, 108,965.15 and 19,335.53 is: 29,003.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.54 : 108,965.15 = 19,335.53 : x
  2. Step 2: Convert to fraction form
    72,643.54/108,965.15 = 19,335.53/x
  3. Step 3: Cross multiply
    72,643.54x = 108,965.15 × 19,335.53
  4. Step 4: Simplify right side
    72,643.54x = 2,106,898,562.09
  5. Step 5: Solve for x
    x = 2,106,898,562.09/72,643.54
  6. Step 6: Final answer
    x = 29,003.25

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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.