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Finding the Fourth Proportional to 111,878.64, 154,387.89 and 64,129.14

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Solution

The fourth proportional to 111,878.64, 154,387.89 and 64,129.14 is: 88,495.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,878.64 : 154,387.89 = 64,129.14 : x
  2. Step 2: Convert to fraction form
    111,878.64/154,387.89 = 64,129.14/x
  3. Step 3: Cross multiply
    111,878.64x = 154,387.89 × 64,129.14
  4. Step 4: Simplify right side
    111,878.64x = 9,900,762,612.11
  5. Step 5: Solve for x
    x = 9,900,762,612.11/111,878.64
  6. Step 6: Final answer
    x = 88,495.56

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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.