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Finding the Fourth Proportional to 72,643.68, 108,965.36 and 19,335.67

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Solution

The fourth proportional to 72,643.68, 108,965.36 and 19,335.67 is: 29,003.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.68 : 108,965.36 = 19,335.67 : x
  2. Step 2: Convert to fraction form
    72,643.68/108,965.36 = 19,335.67/x
  3. Step 3: Cross multiply
    72,643.68x = 108,965.36 × 19,335.67
  4. Step 4: Simplify right side
    72,643.68x = 2,106,917,909.55
  5. Step 5: Solve for x
    x = 2,106,917,909.55/72,643.68
  6. Step 6: Final answer
    x = 29,003.46

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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.