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Finding the Fourth Proportional to 61,909.92, 92,871.36 and 20,360.16

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Solution

The fourth proportional to 61,909.92, 92,871.36 and 20,360.16 is: 30,542.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,909.92 : 92,871.36 = 20,360.16 : x
  2. Step 2: Convert to fraction form
    61,909.92/92,871.36 = 20,360.16/x
  3. Step 3: Cross multiply
    61,909.92x = 92,871.36 × 20,360.16
  4. Step 4: Simplify right side
    61,909.92x = 1,890,875,749.02
  5. Step 5: Solve for x
    x = 1,890,875,749.02/61,909.92
  6. Step 6: Final answer
    x = 30,542.37

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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.