Home / 409,104.14-613,752.80-128,621.39

Finding the Fourth Proportional to 409,104.14, 613,752.80 and 128,621.39

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Solution

The fourth proportional to 409,104.14, 613,752.80 and 128,621.39 is: 192,962.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,104.14 : 613,752.80 = 128,621.39 : x
  2. Step 2: Convert to fraction form
    409,104.14/613,752.80 = 128,621.39/x
  3. Step 3: Cross multiply
    409,104.14x = 613,752.80 × 128,621.39
  4. Step 4: Simplify right side
    409,104.14x = 78,941,738,252.39
  5. Step 5: Solve for x
    x = 78,941,738,252.39/409,104.14
  6. Step 6: Final answer
    x = 192,962.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.