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Finding the Fourth Proportional to 67,296.68, 100,959.42 and 20,553

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Solution

The fourth proportional to 67,296.68, 100,959.42 and 20,553 is: 30,833.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,296.68 : 100,959.42 = 20,553 : x
  2. Step 2: Convert to fraction form
    67,296.68/100,959.42 = 20,553/x
  3. Step 3: Cross multiply
    67,296.68x = 100,959.42 × 20,553
  4. Step 4: Simplify right side
    67,296.68x = 2,075,018,959.26
  5. Step 5: Solve for x
    x = 2,075,018,959.26/67,296.68
  6. Step 6: Final answer
    x = 30,833.90

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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.