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Finding the Fourth Proportional to 66,749.92, 92,105.80 and 39,886.80

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Solution

The fourth proportional to 66,749.92, 92,105.80 and 39,886.80 is: 55,038.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,749.92 : 92,105.80 = 39,886.80 : x
  2. Step 2: Convert to fraction form
    66,749.92/92,105.80 = 39,886.80/x
  3. Step 3: Cross multiply
    66,749.92x = 92,105.80 × 39,886.80
  4. Step 4: Simplify right side
    66,749.92x = 3,673,805,623.44
  5. Step 5: Solve for x
    x = 3,673,805,623.44/66,749.92
  6. Step 6: Final answer
    x = 55,038.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.