Home / 66,061.89-91,151.10-39,213.36

Finding the Fourth Proportional to 66,061.89, 91,151.10 and 39,213.36

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Solution

The fourth proportional to 66,061.89, 91,151.10 and 39,213.36 is: 54,105.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,061.89 : 91,151.10 = 39,213.36 : x
  2. Step 2: Convert to fraction form
    66,061.89/91,151.10 = 39,213.36/x
  3. Step 3: Cross multiply
    66,061.89x = 91,151.10 × 39,213.36
  4. Step 4: Simplify right side
    66,061.89x = 3,574,340,898.70
  5. Step 5: Solve for x
    x = 3,574,340,898.70/66,061.89
  6. Step 6: Final answer
    x = 54,105.94

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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.