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Finding the Fourth Proportional to 93,211.55, 139,891.13 and 40,657.94

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Solution

The fourth proportional to 93,211.55, 139,891.13 and 40,657.94 is: 61,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,211.55 : 139,891.13 = 40,657.94 : x
  2. Step 2: Convert to fraction form
    93,211.55/139,891.13 = 40,657.94/x
  3. Step 3: Cross multiply
    93,211.55x = 139,891.13 × 40,657.94
  4. Step 4: Simplify right side
    93,211.55x = 5,687,685,170.07
  5. Step 5: Solve for x
    x = 5,687,685,170.07/93,211.55
  6. Step 6: Final answer
    x = 61,019.10

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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.