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Finding the Fourth Proportional to 66,090.84, 91,252.78 and 40,631.37

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Solution

The fourth proportional to 66,090.84, 91,252.78 and 40,631.37 is: 56,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,090.84 : 91,252.78 = 40,631.37 : x
  2. Step 2: Convert to fraction form
    66,090.84/91,252.78 = 40,631.37/x
  3. Step 3: Cross multiply
    66,090.84x = 91,252.78 × 40,631.37
  4. Step 4: Simplify right side
    66,090.84x = 3,707,725,537.23
  5. Step 5: Solve for x
    x = 3,707,725,537.23/66,090.84
  6. Step 6: Final answer
    x = 56,100.45

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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.