Home / 66,167.28-91,300.57-39,309.10

Finding the Fourth Proportional to 66,167.28, 91,300.57 and 39,309.10

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Solution

The fourth proportional to 66,167.28, 91,300.57 and 39,309.10 is: 54,240.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,167.28 : 91,300.57 = 39,309.10 : x
  2. Step 2: Convert to fraction form
    66,167.28/91,300.57 = 39,309.10/x
  3. Step 3: Cross multiply
    66,167.28x = 91,300.57 × 39,309.10
  4. Step 4: Simplify right side
    66,167.28x = 3,588,942,909.66
  5. Step 5: Solve for x
    x = 3,588,942,909.66/66,167.28
  6. Step 6: Final answer
    x = 54,240.45

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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.