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Finding the Fourth Proportional to 71,663.98, 98,893.77 and 39,398.36

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Solution

The fourth proportional to 71,663.98, 98,893.77 and 39,398.36 is: 54,368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,663.98 : 98,893.77 = 39,398.36 : x
  2. Step 2: Convert to fraction form
    71,663.98/98,893.77 = 39,398.36/x
  3. Step 3: Cross multiply
    71,663.98x = 98,893.77 × 39,398.36
  4. Step 4: Simplify right side
    71,663.98x = 3,896,252,599.45
  5. Step 5: Solve for x
    x = 3,896,252,599.45/71,663.98
  6. Step 6: Final answer
    x = 54,368.36

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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.