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Finding the Fourth Proportional to 66,603.60, 91,926.09 and 39,732.66

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Solution

The fourth proportional to 66,603.60, 91,926.09 and 39,732.66 is: 54,838.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.60 : 91,926.09 = 39,732.66 : x
  2. Step 2: Convert to fraction form
    66,603.60/91,926.09 = 39,732.66/x
  3. Step 3: Cross multiply
    66,603.60x = 91,926.09 × 39,732.66
  4. Step 4: Simplify right side
    66,603.60x = 3,652,468,079.10
  5. Step 5: Solve for x
    x = 3,652,468,079.10/66,603.60
  6. Step 6: Final answer
    x = 54,838.90

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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.