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Finding the Fourth Proportional to 66,407.56, 99,401.90 and 42,683.26

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Solution

The fourth proportional to 66,407.56, 99,401.90 and 42,683.26 is: 63,890.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,407.56 : 99,401.90 = 42,683.26 : x
  2. Step 2: Convert to fraction form
    66,407.56/99,401.90 = 42,683.26/x
  3. Step 3: Cross multiply
    66,407.56x = 99,401.90 × 42,683.26
  4. Step 4: Simplify right side
    66,407.56x = 4,242,797,142.19
  5. Step 5: Solve for x
    x = 4,242,797,142.19/66,407.56
  6. Step 6: Final answer
    x = 63,890.27

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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.