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Finding the Fourth Proportional to 66,919.71, 92,457.68 and 56,953.47

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Solution

The fourth proportional to 66,919.71, 92,457.68 and 56,953.47 is: 78,688.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.71 : 92,457.68 = 56,953.47 : x
  2. Step 2: Convert to fraction form
    66,919.71/92,457.68 = 56,953.47/x
  3. Step 3: Cross multiply
    66,919.71x = 92,457.68 × 56,953.47
  4. Step 4: Simplify right side
    66,919.71x = 5,265,785,419.38
  5. Step 5: Solve for x
    x = 5,265,785,419.38/66,919.71
  6. Step 6: Final answer
    x = 78,688.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.