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Finding the Fourth Proportional to 99,690.57, 137,571.30 and 54,368.64

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Solution

The fourth proportional to 99,690.57, 137,571.30 and 54,368.64 is: 75,027.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690.57 : 137,571.30 = 54,368.64 : x
  2. Step 2: Convert to fraction form
    99,690.57/137,571.30 = 54,368.64/x
  3. Step 3: Cross multiply
    99,690.57x = 137,571.30 × 54,368.64
  4. Step 4: Simplify right side
    99,690.57x = 7,479,564,484.03
  5. Step 5: Solve for x
    x = 7,479,564,484.03/99,690.57
  6. Step 6: Final answer
    x = 75,027.80

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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.