Home / 66,284.18-91,437.30-39,407.57

Finding the Fourth Proportional to 66,284.18, 91,437.30 and 39,407.57

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Solution

The fourth proportional to 66,284.18, 91,437.30 and 39,407.57 is: 54,361.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,284.18 : 91,437.30 = 39,407.57 : x
  2. Step 2: Convert to fraction form
    66,284.18/91,437.30 = 39,407.57/x
  3. Step 3: Cross multiply
    66,284.18x = 91,437.30 × 39,407.57
  4. Step 4: Simplify right side
    66,284.18x = 3,603,321,800.36
  5. Step 5: Solve for x
    x = 3,603,321,800.36/66,284.18
  6. Step 6: Final answer
    x = 54,361.72

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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.