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Finding the Fourth Proportional to 66,347.66, 91,553.75 and 39,485.84

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Solution

The fourth proportional to 66,347.66, 91,553.75 and 39,485.84 is: 54,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,347.66 : 91,553.75 = 39,485.84 : x
  2. Step 2: Convert to fraction form
    66,347.66/91,553.75 = 39,485.84/x
  3. Step 3: Cross multiply
    66,347.66x = 91,553.75 × 39,485.84
  4. Step 4: Simplify right side
    66,347.66x = 3,615,076,216.77
  5. Step 5: Solve for x
    x = 3,615,076,216.77/66,347.66
  6. Step 6: Final answer
    x = 54,486.87

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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.