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Finding the Fourth Proportional to 99,486.46, 149,235.54 and 28,403.64

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Solution

The fourth proportional to 99,486.46, 149,235.54 and 28,403.64 is: 42,607.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,486.46 : 149,235.54 = 28,403.64 : x
  2. Step 2: Convert to fraction form
    99,486.46/149,235.54 = 28,403.64/x
  3. Step 3: Cross multiply
    99,486.46x = 149,235.54 × 28,403.64
  4. Step 4: Simplify right side
    99,486.46x = 4,238,832,553.37
  5. Step 5: Solve for x
    x = 4,238,832,553.37/99,486.46
  6. Step 6: Final answer
    x = 42,607.13

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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.