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Finding the Fourth Proportional to 66,551.12, 91,807.39 and 39,674.69

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Solution

The fourth proportional to 66,551.12, 91,807.39 and 39,674.69 is: 54,731.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,551.12 : 91,807.39 = 39,674.69 : x
  2. Step 2: Convert to fraction form
    66,551.12/91,807.39 = 39,674.69/x
  3. Step 3: Cross multiply
    66,551.12x = 91,807.39 × 39,674.69
  4. Step 4: Simplify right side
    66,551.12x = 3,642,429,737.96
  5. Step 5: Solve for x
    x = 3,642,429,737.96/66,551.12
  6. Step 6: Final answer
    x = 54,731.31

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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.