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Finding the Fourth Proportional to 66,603.13, 91,912.25 and 38,308.82

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Solution

The fourth proportional to 66,603.13, 91,912.25 and 38,308.82 is: 52,866.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.13 : 91,912.25 = 38,308.82 : x
  2. Step 2: Convert to fraction form
    66,603.13/91,912.25 = 38,308.82/x
  3. Step 3: Cross multiply
    66,603.13x = 91,912.25 × 38,308.82
  4. Step 4: Simplify right side
    66,603.13x = 3,521,049,477.26
  5. Step 5: Solve for x
    x = 3,521,049,477.26/66,603.13
  6. Step 6: Final answer
    x = 52,866.13

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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.