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Finding the Fourth Proportional to 71,693.79, 98,935.40 and 39,862.11

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Solution

The fourth proportional to 71,693.79, 98,935.40 and 39,862.11 is: 55,008.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.79 : 98,935.40 = 39,862.11 : x
  2. Step 2: Convert to fraction form
    71,693.79/98,935.40 = 39,862.11/x
  3. Step 3: Cross multiply
    71,693.79x = 98,935.40 × 39,862.11
  4. Step 4: Simplify right side
    71,693.79x = 3,943,773,598.38
  5. Step 5: Solve for x
    x = 3,943,773,598.38/71,693.79
  6. Step 6: Final answer
    x = 55,008.58

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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.