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Finding the Fourth Proportional to 66,718.85, 99,406.65 and 65,756.57

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Solution

The fourth proportional to 66,718.85, 99,406.65 and 65,756.57 is: 97,972.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,718.85 : 99,406.65 = 65,756.57 : x
  2. Step 2: Convert to fraction form
    66,718.85/99,406.65 = 65,756.57/x
  3. Step 3: Cross multiply
    66,718.85x = 99,406.65 × 65,756.57
  4. Step 4: Simplify right side
    66,718.85x = 6,536,640,010.41
  5. Step 5: Solve for x
    x = 6,536,640,010.41/66,718.85
  6. Step 6: Final answer
    x = 97,972.91

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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.