Home / 66,538.12-91,812.12-38,238.28

Finding the Fourth Proportional to 66,538.12, 91,812.12 and 38,238.28

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Solution

The fourth proportional to 66,538.12, 91,812.12 and 38,238.28 is: 52,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,538.12 : 91,812.12 = 38,238.28 : x
  2. Step 2: Convert to fraction form
    66,538.12/91,812.12 = 38,238.28/x
  3. Step 3: Cross multiply
    66,538.12x = 91,812.12 × 38,238.28
  4. Step 4: Simplify right side
    66,538.12x = 3,510,737,551.95
  5. Step 5: Solve for x
    x = 3,510,737,551.95/66,538.12
  6. Step 6: Final answer
    x = 52,762.80

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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.