Home / 57,100.20-78,816.18-39,220.20

Finding the Fourth Proportional to 57,100.20, 78,816.18 and 39,220.20

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Solution

The fourth proportional to 57,100.20, 78,816.18 and 39,220.20 is: 54,136.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,100.20 : 78,816.18 = 39,220.20 : x
  2. Step 2: Convert to fraction form
    57,100.20/78,816.18 = 39,220.20/x
  3. Step 3: Cross multiply
    57,100.20x = 78,816.18 × 39,220.20
  4. Step 4: Simplify right side
    57,100.20x = 3,091,186,342.84
  5. Step 5: Solve for x
    x = 3,091,186,342.84/57,100.20
  6. Step 6: Final answer
    x = 54,136.17

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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.