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Finding the Fourth Proportional to 61,651.71, 92,031.53 and 54,178.38

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Solution

The fourth proportional to 61,651.71, 92,031.53 and 54,178.38 is: 80,875.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,651.71 : 92,031.53 = 54,178.38 : x
  2. Step 2: Convert to fraction form
    61,651.71/92,031.53 = 54,178.38/x
  3. Step 3: Cross multiply
    61,651.71x = 92,031.53 × 54,178.38
  4. Step 4: Simplify right side
    61,651.71x = 4,986,118,933.43
  5. Step 5: Solve for x
    x = 4,986,118,933.43/61,651.71
  6. Step 6: Final answer
    x = 80,875.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.