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Finding the Fourth Proportional to 99,008.94, 136,620.08 and 63,219.90

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Solution

The fourth proportional to 99,008.94, 136,620.08 and 63,219.90 is: 87,235.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,008.94 : 136,620.08 = 63,219.90 : x
  2. Step 2: Convert to fraction form
    99,008.94/136,620.08 = 63,219.90/x
  3. Step 3: Cross multiply
    99,008.94x = 136,620.08 × 63,219.90
  4. Step 4: Simplify right side
    99,008.94x = 8,637,107,795.59
  5. Step 5: Solve for x
    x = 8,637,107,795.59/99,008.94
  6. Step 6: Final answer
    x = 87,235.64

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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.