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Finding the Fourth Proportional to 66,153.78, 91,241.92 and 45,769.76

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Solution

The fourth proportional to 66,153.78, 91,241.92 and 45,769.76 is: 63,127.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,153.78 : 91,241.92 = 45,769.76 : x
  2. Step 2: Convert to fraction form
    66,153.78/91,241.92 = 45,769.76/x
  3. Step 3: Cross multiply
    66,153.78x = 91,241.92 × 45,769.76
  4. Step 4: Simplify right side
    66,153.78x = 4,176,120,780.34
  5. Step 5: Solve for x
    x = 4,176,120,780.34/66,153.78
  6. Step 6: Final answer
    x = 63,127.47

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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.