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Finding the Fourth Proportional to 66,491.40, 91,773.88 and 38,213.48

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Solution

The fourth proportional to 66,491.40, 91,773.88 and 38,213.48 is: 52,743.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.40 : 91,773.88 = 38,213.48 : x
  2. Step 2: Convert to fraction form
    66,491.40/91,773.88 = 38,213.48/x
  3. Step 3: Cross multiply
    66,491.40x = 91,773.88 × 38,213.48
  4. Step 4: Simplify right side
    66,491.40x = 3,506,999,327.90
  5. Step 5: Solve for x
    x = 3,506,999,327.90/66,491.40
  6. Step 6: Final answer
    x = 52,743.65

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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.