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Finding the Fourth Proportional to 66,496.62, 91,780.23 and 39,653.91

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Solution

The fourth proportional to 66,496.62, 91,780.23 and 39,653.91 is: 54,731.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,496.62 : 91,780.23 = 39,653.91 : x
  2. Step 2: Convert to fraction form
    66,496.62/91,780.23 = 39,653.91/x
  3. Step 3: Cross multiply
    66,496.62x = 91,780.23 × 39,653.91
  4. Step 4: Simplify right side
    66,496.62x = 3,639,444,980.20
  5. Step 5: Solve for x
    x = 3,639,444,980.20/66,496.62
  6. Step 6: Final answer
    x = 54,731.28

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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.