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Finding the Fourth Proportional to 53,575.61, 80,357.78 and 21,989.01

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Solution

The fourth proportional to 53,575.61, 80,357.78 and 21,989.01 is: 32,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,575.61 : 80,357.78 = 21,989.01 : x
  2. Step 2: Convert to fraction form
    53,575.61/80,357.78 = 21,989.01/x
  3. Step 3: Cross multiply
    53,575.61x = 80,357.78 × 21,989.01
  4. Step 4: Simplify right side
    53,575.61x = 1,766,987,918.05
  5. Step 5: Solve for x
    x = 1,766,987,918.05/53,575.61
  6. Step 6: Final answer
    x = 32,981.20

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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.