Home / 66,189.88-91,344.05-40,711.20

Finding the Fourth Proportional to 66,189.88, 91,344.05 and 40,711.20

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Solution

The fourth proportional to 66,189.88, 91,344.05 and 40,711.20 is: 56,182.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,189.88 : 91,344.05 = 40,711.20 : x
  2. Step 2: Convert to fraction form
    66,189.88/91,344.05 = 40,711.20/x
  3. Step 3: Cross multiply
    66,189.88x = 91,344.05 × 40,711.20
  4. Step 4: Simplify right side
    66,189.88x = 3,718,725,888.36
  5. Step 5: Solve for x
    x = 3,718,725,888.36/66,189.88
  6. Step 6: Final answer
    x = 56,182.70

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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.