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Finding the Fourth Proportional to 66,449.70, 99,674.55 and 61,380.90

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Solution

The fourth proportional to 66,449.70, 99,674.55 and 61,380.90 is: 92,071.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,449.70 : 99,674.55 = 61,380.90 : x
  2. Step 2: Convert to fraction form
    66,449.70/99,674.55 = 61,380.90/x
  3. Step 3: Cross multiply
    66,449.70x = 99,674.55 × 61,380.90
  4. Step 4: Simplify right side
    66,449.70x = 6,118,113,586.10
  5. Step 5: Solve for x
    x = 6,118,113,586.10/66,449.70
  6. Step 6: Final answer
    x = 92,071.35

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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.