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Finding the Fourth Proportional to 64,102.76, 87,990.97 and 56,871.08

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Solution

The fourth proportional to 64,102.76, 87,990.97 and 56,871.08 is: 78,064.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,102.76 : 87,990.97 = 56,871.08 : x
  2. Step 2: Convert to fraction form
    64,102.76/87,990.97 = 56,871.08/x
  3. Step 3: Cross multiply
    64,102.76x = 87,990.97 × 56,871.08
  4. Step 4: Simplify right side
    64,102.76x = 5,004,141,494.15
  5. Step 5: Solve for x
    x = 5,004,141,494.15/64,102.76
  6. Step 6: Final answer
    x = 78,064.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.