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Finding the Fourth Proportional to 71,646.76, 98,866.92 and 39,813.76

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Solution

The fourth proportional to 71,646.76, 98,866.92 and 39,813.76 is: 54,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,646.76 : 98,866.92 = 39,813.76 : x
  2. Step 2: Convert to fraction form
    71,646.76/98,866.92 = 39,813.76/x
  3. Step 3: Cross multiply
    71,646.76x = 98,866.92 × 39,813.76
  4. Step 4: Simplify right side
    71,646.76x = 3,936,263,824.82
  5. Step 5: Solve for x
    x = 3,936,263,824.82/71,646.76
  6. Step 6: Final answer
    x = 54,939.87

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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.