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Finding the Fourth Proportional to 72,502.92, 108,749.52 and 19,908

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Solution

The fourth proportional to 72,502.92, 108,749.52 and 19,908 is: 29,860.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,502.92 : 108,749.52 = 19,908 : x
  2. Step 2: Convert to fraction form
    72,502.92/108,749.52 = 19,908/x
  3. Step 3: Cross multiply
    72,502.92x = 108,749.52 × 19,908
  4. Step 4: Simplify right side
    72,502.92x = 2,164,985,444.16
  5. Step 5: Solve for x
    x = 2,164,985,444.16/72,502.92
  6. Step 6: Final answer
    x = 29,860.67

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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.