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Finding the Fourth Proportional to 64,857.36, 89,496.60 and 47,870.88

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Solution

The fourth proportional to 64,857.36, 89,496.60 and 47,870.88 is: 66,056.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,857.36 : 89,496.60 = 47,870.88 : x
  2. Step 2: Convert to fraction form
    64,857.36/89,496.60 = 47,870.88/x
  3. Step 3: Cross multiply
    64,857.36x = 89,496.60 × 47,870.88
  4. Step 4: Simplify right side
    64,857.36x = 4,284,280,999.01
  5. Step 5: Solve for x
    x = 4,284,280,999.01/64,857.36
  6. Step 6: Final answer
    x = 66,056.97

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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.