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Finding the Fourth Proportional to 100,979.80, 151,396.80 and 56,620.15

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Solution

The fourth proportional to 100,979.80, 151,396.80 and 56,620.15 is: 84,889.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,979.80 : 151,396.80 = 56,620.15 : x
  2. Step 2: Convert to fraction form
    100,979.80/151,396.80 = 56,620.15/x
  3. Step 3: Cross multiply
    100,979.80x = 151,396.80 × 56,620.15
  4. Step 4: Simplify right side
    100,979.80x = 8,572,109,525.52
  5. Step 5: Solve for x
    x = 8,572,109,525.52/100,979.80
  6. Step 6: Final answer
    x = 84,889.35

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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.