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Finding the Fourth Proportional to 64,742.67, 96,989.58 and 39,709.71

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Solution

The fourth proportional to 64,742.67, 96,989.58 and 39,709.71 is: 59,488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,742.67 : 96,989.58 = 39,709.71 : x
  2. Step 2: Convert to fraction form
    64,742.67/96,989.58 = 39,709.71/x
  3. Step 3: Cross multiply
    64,742.67x = 96,989.58 × 39,709.71
  4. Step 4: Simplify right side
    64,742.67x = 3,851,428,094.82
  5. Step 5: Solve for x
    x = 3,851,428,094.82/64,742.67
  6. Step 6: Final answer
    x = 59,488.25

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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.