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Finding the Fourth Proportional to 66,384.76, 91,700.49 and 61,660.84

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Solution

The fourth proportional to 66,384.76, 91,700.49 and 61,660.84 is: 85,175.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,384.76 : 91,700.49 = 61,660.84 : x
  2. Step 2: Convert to fraction form
    66,384.76/91,700.49 = 61,660.84/x
  3. Step 3: Cross multiply
    66,384.76x = 91,700.49 × 61,660.84
  4. Step 4: Simplify right side
    66,384.76x = 5,654,329,241.81
  5. Step 5: Solve for x
    x = 5,654,329,241.81/66,384.76
  6. Step 6: Final answer
    x = 85,175.11

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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.