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Finding the Fourth Proportional to 99,879.98, 137,832.99 and 54,557.42

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Solution

The fourth proportional to 99,879.98, 137,832.99 and 54,557.42 is: 75,288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,879.98 : 137,832.99 = 54,557.42 : x
  2. Step 2: Convert to fraction form
    99,879.98/137,832.99 = 54,557.42/x
  3. Step 3: Cross multiply
    99,879.98x = 137,832.99 × 54,557.42
  4. Step 4: Simplify right side
    99,879.98x = 7,519,812,325.29
  5. Step 5: Solve for x
    x = 7,519,812,325.29/99,879.98
  6. Step 6: Final answer
    x = 75,288.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.