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Finding the Fourth Proportional to 67,051.20, 100,590.30 and 19,666.20

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Solution

The fourth proportional to 67,051.20, 100,590.30 and 19,666.20 is: 29,503.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,051.20 : 100,590.30 = 19,666.20 : x
  2. Step 2: Convert to fraction form
    67,051.20/100,590.30 = 19,666.20/x
  3. Step 3: Cross multiply
    67,051.20x = 100,590.30 × 19,666.20
  4. Step 4: Simplify right side
    67,051.20x = 1,978,228,957.86
  5. Step 5: Solve for x
    x = 1,978,228,957.86/67,051.20
  6. Step 6: Final answer
    x = 29,503.26

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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.