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Finding the Fourth Proportional to 66,460.56, 91,722.88 and 40,961.76

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Solution

The fourth proportional to 66,460.56, 91,722.88 and 40,961.76 is: 56,531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,460.56 : 91,722.88 = 40,961.76 : x
  2. Step 2: Convert to fraction form
    66,460.56/91,722.88 = 40,961.76/x
  3. Step 3: Cross multiply
    66,460.56x = 91,722.88 × 40,961.76
  4. Step 4: Simplify right side
    66,460.56x = 3,757,130,597.07
  5. Step 5: Solve for x
    x = 3,757,130,597.07/66,460.56
  6. Step 6: Final answer
    x = 56,531.73

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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.