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Finding the Fourth Proportional to 52,492.65, 78,721.86 and 17,422.89

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Solution

The fourth proportional to 52,492.65, 78,721.86 and 17,422.89 is: 26,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,492.65 : 78,721.86 = 17,422.89 : x
  2. Step 2: Convert to fraction form
    52,492.65/78,721.86 = 17,422.89/x
  3. Step 3: Cross multiply
    52,492.65x = 78,721.86 × 17,422.89
  4. Step 4: Simplify right side
    52,492.65x = 1,371,562,307.38
  5. Step 5: Solve for x
    x = 1,371,562,307.38/52,492.65
  6. Step 6: Final answer
    x = 26,128.65

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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.