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Finding the Fourth Proportional to 66,479.85, 99,778.10 and 36,931.05

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Solution

The fourth proportional to 66,479.85, 99,778.10 and 36,931.05 is: 55,428.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.85 : 99,778.10 = 36,931.05 : x
  2. Step 2: Convert to fraction form
    66,479.85/99,778.10 = 36,931.05/x
  3. Step 3: Cross multiply
    66,479.85x = 99,778.10 × 36,931.05
  4. Step 4: Simplify right side
    66,479.85x = 3,684,909,815.35
  5. Step 5: Solve for x
    x = 3,684,909,815.35/66,479.85
  6. Step 6: Final answer
    x = 55,428.97

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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.