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Finding the Fourth Proportional to 168,618.16, 253,051.98 and 79,871.86

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Solution

The fourth proportional to 168,618.16, 253,051.98 and 79,871.86 is: 119,866.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,618.16 : 253,051.98 = 79,871.86 : x
  2. Step 2: Convert to fraction form
    168,618.16/253,051.98 = 79,871.86/x
  3. Step 3: Cross multiply
    168,618.16x = 253,051.98 × 79,871.86
  4. Step 4: Simplify right side
    168,618.16x = 20,211,732,319.28
  5. Step 5: Solve for x
    x = 20,211,732,319.28/168,618.16
  6. Step 6: Final answer
    x = 119,866.88

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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.