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Finding the Fourth Proportional to 66,765.88, 92,136.72 and 38,471.50

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Solution

The fourth proportional to 66,765.88, 92,136.72 and 38,471.50 is: 53,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,765.88 : 92,136.72 = 38,471.50 : x
  2. Step 2: Convert to fraction form
    66,765.88/92,136.72 = 38,471.50/x
  3. Step 3: Cross multiply
    66,765.88x = 92,136.72 × 38,471.50
  4. Step 4: Simplify right side
    66,765.88x = 3,544,637,823.48
  5. Step 5: Solve for x
    x = 3,544,637,823.48/66,765.88
  6. Step 6: Final answer
    x = 53,090.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.