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Finding the Fourth Proportional to 99,479.79, 149,230.35 and 42,559.61

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Solution

The fourth proportional to 99,479.79, 149,230.35 and 42,559.61 is: 63,843.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,479.79 : 149,230.35 = 42,559.61 : x
  2. Step 2: Convert to fraction form
    99,479.79/149,230.35 = 42,559.61/x
  3. Step 3: Cross multiply
    99,479.79x = 149,230.35 × 42,559.61
  4. Step 4: Simplify right side
    99,479.79x = 6,351,184,750.01
  5. Step 5: Solve for x
    x = 6,351,184,750.01/99,479.79
  6. Step 6: Final answer
    x = 63,843.97

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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.