Home / 261,210.30-391,815.45-121,242.30

Finding the Fourth Proportional to 261,210.30, 391,815.45 and 121,242.30

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Solution

The fourth proportional to 261,210.30, 391,815.45 and 121,242.30 is: 181,863.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,210.30 : 391,815.45 = 121,242.30 : x
  2. Step 2: Convert to fraction form
    261,210.30/391,815.45 = 121,242.30/x
  3. Step 3: Cross multiply
    261,210.30x = 391,815.45 × 121,242.30
  4. Step 4: Simplify right side
    261,210.30x = 47,504,606,333.54
  5. Step 5: Solve for x
    x = 47,504,606,333.54/261,210.30
  6. Step 6: Final answer
    x = 181,863.45

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Similar ratio
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1.5x scale

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.