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Finding the Fourth Proportional to 43,308.99, 64,911.17 and 21,089.07

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Solution

The fourth proportional to 43,308.99, 64,911.17 and 21,089.07 is: 31,608.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,308.99 : 64,911.17 = 21,089.07 : x
  2. Step 2: Convert to fraction form
    43,308.99/64,911.17 = 21,089.07/x
  3. Step 3: Cross multiply
    43,308.99x = 64,911.17 × 21,089.07
  4. Step 4: Simplify right side
    43,308.99x = 1,368,916,102.47
  5. Step 5: Solve for x
    x = 1,368,916,102.47/43,308.99
  6. Step 6: Final answer
    x = 31,608.13

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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.