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Finding the Fourth Proportional to 66,777.90, 99,970.02 and 49,325.64

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Solution

The fourth proportional to 66,777.90, 99,970.02 and 49,325.64 is: 73,843.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,777.90 : 99,970.02 = 49,325.64 : x
  2. Step 2: Convert to fraction form
    66,777.90/99,970.02 = 49,325.64/x
  3. Step 3: Cross multiply
    66,777.90x = 99,970.02 × 49,325.64
  4. Step 4: Simplify right side
    66,777.90x = 4,931,085,217.31
  5. Step 5: Solve for x
    x = 4,931,085,217.31/66,777.90
  6. Step 6: Final answer
    x = 73,843.07

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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.