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Finding the Fourth Proportional to 64,964.99, 97,456.71 and 19,990.08

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Solution

The fourth proportional to 64,964.99, 97,456.71 and 19,990.08 is: 29,987.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,964.99 : 97,456.71 = 19,990.08 : x
  2. Step 2: Convert to fraction form
    64,964.99/97,456.71 = 19,990.08/x
  3. Step 3: Cross multiply
    64,964.99x = 97,456.71 × 19,990.08
  4. Step 4: Simplify right side
    64,964.99x = 1,948,167,429.44
  5. Step 5: Solve for x
    x = 1,948,167,429.44/64,964.99
  6. Step 6: Final answer
    x = 29,987.96

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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.