Home / 67,288.77-100,929.51-20,538

Finding the Fourth Proportional to 67,288.77, 100,929.51 and 20,538

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Solution

The fourth proportional to 67,288.77, 100,929.51 and 20,538 is: 30,805.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,288.77 : 100,929.51 = 20,538 : x
  2. Step 2: Convert to fraction form
    67,288.77/100,929.51 = 20,538/x
  3. Step 3: Cross multiply
    67,288.77x = 100,929.51 × 20,538
  4. Step 4: Simplify right side
    67,288.77x = 2,072,890,276.38
  5. Step 5: Solve for x
    x = 2,072,890,276.38/67,288.77
  6. Step 6: Final answer
    x = 30,805.89

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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.