Home / 387,739.52-581,609.47-121,520.76

Finding the Fourth Proportional to 387,739.52, 581,609.47 and 121,520.76

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Solution

The fourth proportional to 387,739.52, 581,609.47 and 121,520.76 is: 182,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,739.52 : 581,609.47 = 121,520.76 : x
  2. Step 2: Convert to fraction form
    387,739.52/581,609.47 = 121,520.76/x
  3. Step 3: Cross multiply
    387,739.52x = 581,609.47 × 121,520.76
  4. Step 4: Simplify right side
    387,739.52x = 70,677,624,817.60
  5. Step 5: Solve for x
    x = 70,677,624,817.60/387,739.52
  6. Step 6: Final answer
    x = 182,281.20

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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.