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Finding the Fourth Proportional to 67,650.86, 101,486.01 and 20,907.38

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Solution

The fourth proportional to 67,650.86, 101,486.01 and 20,907.38 is: 31,364.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,650.86 : 101,486.01 = 20,907.38 : x
  2. Step 2: Convert to fraction form
    67,650.86/101,486.01 = 20,907.38/x
  3. Step 3: Cross multiply
    67,650.86x = 101,486.01 × 20,907.38
  4. Step 4: Simplify right side
    67,650.86x = 2,121,806,068.32
  5. Step 5: Solve for x
    x = 2,121,806,068.32/67,650.86
  6. Step 6: Final answer
    x = 31,364.07

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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.