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Finding the Fourth Proportional to 61,940.10, 92,910.15 and 57,792.90

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Solution

The fourth proportional to 61,940.10, 92,910.15 and 57,792.90 is: 86,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,940.10 : 92,910.15 = 57,792.90 : x
  2. Step 2: Convert to fraction form
    61,940.10/92,910.15 = 57,792.90/x
  3. Step 3: Cross multiply
    61,940.10x = 92,910.15 × 57,792.90
  4. Step 4: Simplify right side
    61,940.10x = 5,369,547,007.94
  5. Step 5: Solve for x
    x = 5,369,547,007.94/61,940.10
  6. Step 6: Final answer
    x = 86,689.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.