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Finding the Fourth Proportional to 64,980, 97,474.86 and 36,889.20

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Solution

The fourth proportional to 64,980, 97,474.86 and 36,889.20 is: 55,336.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,980 : 97,474.86 = 36,889.20 : x
  2. Step 2: Convert to fraction form
    64,980/97,474.86 = 36,889.20/x
  3. Step 3: Cross multiply
    64,980x = 97,474.86 × 36,889.20
  4. Step 4: Simplify right side
    64,980x = 3,595,769,605.51
  5. Step 5: Solve for x
    x = 3,595,769,605.51/64,980
  6. Step 6: Final answer
    x = 55,336.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.