Home / 387,454.39-581,181.58-121,217.21

Finding the Fourth Proportional to 387,454.39, 581,181.58 and 121,217.21

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Solution

The fourth proportional to 387,454.39, 581,181.58 and 121,217.21 is: 181,825.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,454.39 : 581,181.58 = 121,217.21 : x
  2. Step 2: Convert to fraction form
    387,454.39/581,181.58 = 121,217.21/x
  3. Step 3: Cross multiply
    387,454.39x = 581,181.58 × 121,217.21
  4. Step 4: Simplify right side
    387,454.39x = 70,449,209,056.04
  5. Step 5: Solve for x
    x = 70,449,209,056.04/387,454.39
  6. Step 6: Final answer
    x = 181,825.81

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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.