Home / 66,210.18-91,399.50-39,361.38

Finding the Fourth Proportional to 66,210.18, 91,399.50 and 39,361.38

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Solution

The fourth proportional to 66,210.18, 91,399.50 and 39,361.38 is: 54,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,210.18 : 91,399.50 = 39,361.38 : x
  2. Step 2: Convert to fraction form
    66,210.18/91,399.50 = 39,361.38/x
  3. Step 3: Cross multiply
    66,210.18x = 91,399.50 × 39,361.38
  4. Step 4: Simplify right side
    66,210.18x = 3,597,610,451.31
  5. Step 5: Solve for x
    x = 3,597,610,451.31/66,210.18
  6. Step 6: Final answer
    x = 54,336.21

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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.