Home / 387,739.39-581,609.29-121,520.64

Finding the Fourth Proportional to 387,739.39, 581,609.29 and 121,520.64

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Solution

The fourth proportional to 387,739.39, 581,609.29 and 121,520.64 is: 182,281.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,739.39 : 581,609.29 = 121,520.64 : x
  2. Step 2: Convert to fraction form
    387,739.39/581,609.29 = 121,520.64/x
  3. Step 3: Cross multiply
    387,739.39x = 581,609.29 × 121,520.64
  4. Step 4: Simplify right side
    387,739.39x = 70,677,529,635.10
  5. Step 5: Solve for x
    x = 70,677,529,635.10/387,739.39
  6. Step 6: Final answer
    x = 182,281.02

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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.