Home / 387,858.81-581,788.35-121,642.59

Finding the Fourth Proportional to 387,858.81, 581,788.35 and 121,642.59

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Solution

The fourth proportional to 387,858.81, 581,788.35 and 121,642.59 is: 182,463.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,858.81 : 581,788.35 = 121,642.59 : x
  2. Step 2: Convert to fraction form
    387,858.81/581,788.35 = 121,642.59/x
  3. Step 3: Cross multiply
    387,858.81x = 581,788.35 × 121,642.59
  4. Step 4: Simplify right side
    387,858.81x = 70,770,241,725.83
  5. Step 5: Solve for x
    x = 70,770,241,725.83/387,858.81
  6. Step 6: Final answer
    x = 182,463.93

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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.