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Finding the Fourth Proportional to 66,064.96, 91,139.88 and 39,208.60

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Solution

The fourth proportional to 66,064.96, 91,139.88 and 39,208.60 is: 54,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,064.96 : 91,139.88 = 39,208.60 : x
  2. Step 2: Convert to fraction form
    66,064.96/91,139.88 = 39,208.60/x
  3. Step 3: Cross multiply
    66,064.96x = 91,139.88 × 39,208.60
  4. Step 4: Simplify right side
    66,064.96x = 3,573,467,098.97
  5. Step 5: Solve for x
    x = 3,573,467,098.97/66,064.96
  6. Step 6: Final answer
    x = 54,090.20

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1.5x scale

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.