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Finding the Fourth Proportional to 66,491.67, 91,758.53 and 42,618.35

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Solution

The fourth proportional to 66,491.67, 91,758.53 and 42,618.35 is: 58,813.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.67 : 91,758.53 = 42,618.35 : x
  2. Step 2: Convert to fraction form
    66,491.67/91,758.53 = 42,618.35/x
  3. Step 3: Cross multiply
    66,491.67x = 91,758.53 × 42,618.35
  4. Step 4: Simplify right side
    66,491.67x = 3,910,597,482.97
  5. Step 5: Solve for x
    x = 3,910,597,482.97/66,491.67
  6. Step 6: Final answer
    x = 58,813.34

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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.