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Finding the Fourth Proportional to 64,859.36, 89,499.36 and 47,872.88

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Solution

The fourth proportional to 64,859.36, 89,499.36 and 47,872.88 is: 66,059.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,859.36 : 89,499.36 = 47,872.88 : x
  2. Step 2: Convert to fraction form
    64,859.36/89,499.36 = 47,872.88/x
  3. Step 3: Cross multiply
    64,859.36x = 89,499.36 × 47,872.88
  4. Step 4: Simplify right side
    64,859.36x = 4,284,592,121.36
  5. Step 5: Solve for x
    x = 4,284,592,121.36/64,859.36
  6. Step 6: Final answer
    x = 66,059.73

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1.5x scale

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.