Home / 387,783.41-581,682.40-121,538.03

Finding the Fourth Proportional to 387,783.41, 581,682.40 and 121,538.03

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Solution

The fourth proportional to 387,783.41, 581,682.40 and 121,538.03 is: 182,309.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,783.41 : 581,682.40 = 121,538.03 : x
  2. Step 2: Convert to fraction form
    387,783.41/581,682.40 = 121,538.03/x
  3. Step 3: Cross multiply
    387,783.41x = 581,682.40 × 121,538.03
  4. Step 4: Simplify right side
    387,783.41x = 70,696,532,981.67
  5. Step 5: Solve for x
    x = 70,696,532,981.67/387,783.41
  6. Step 6: Final answer
    x = 182,309.33

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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.