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Finding the Fourth Proportional to 64,882.64, 89,405.15 and 47,859.90

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Solution

The fourth proportional to 64,882.64, 89,405.15 and 47,859.90 is: 65,948.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,882.64 : 89,405.15 = 47,859.90 : x
  2. Step 2: Convert to fraction form
    64,882.64/89,405.15 = 47,859.90/x
  3. Step 3: Cross multiply
    64,882.64x = 89,405.15 × 47,859.90
  4. Step 4: Simplify right side
    64,882.64x = 4,278,921,299.19
  5. Step 5: Solve for x
    x = 4,278,921,299.19/64,882.64
  6. Step 6: Final answer
    x = 65,948.64

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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.